Flashbot bundle is not included because "isSendToMiners" is false?

I'm trying to send a flashbot Bundle with several transactions. I use the following code to sign and send a bundle:
```
const signedTransactions = await flashbotsProvider.signBundle([
{
signer: MyWallet,
transaction: firstTx
},
{
signer: MyWallet,
transaction: secondTx
},
{
signer: MyWallet,
transaction: thirdTx
}]);
const targetBlockNumber = block.number;
const simulation = await flashbotsProvider.simulate(
signedTransactions,
targetBlockNumber + 1
)

console.log(simulation);
console.log("bundleHash: ", simulation.bundleHash);

for (var i = 1; i <= 10; i++) {

console.log(">>>>>> ", i);

const bundleSubmission = await flashbotsProvider.sendRawBundle(
signedTransactions,
targetBlockNumber + i
)
console.log('bundle submitted, waiting', bundleSubmission.bundleHash)

const waitResponse = await bundleSubmission.wait()
console.log(`Wait Response: ${FlashbotsBundleResolution[waitResponse]}`)
if (
waitResponse === FlashbotsBundleResolution.BundleIncluded ||
waitResponse === FlashbotsBundleResolution.AccountNonceTooHigh
) {
console.log('Bundle included!')
process.exit(0)
} else {

console.log(">>>", simulation.bundleHash);

console.log({
bundleStats: await flashbotsProvider.getBundleStats(
simulation.bundleHash,
targetBlockNumber + 1,
),
userStats: await flashbotsProvider.getUserStats(),
})
}
}
```
The simulation is successful. However, In order to ensure that the bundle can be included, I for loop 10 times to send a new bundle in case the previous bundle fails. It seems that the bundles are not included because they are not sent to the miners(isSentToMiners is false). Why does this happen?
```
bundleHash: 0x012ca7ac493afc4bf288bb9cde4b49d521d1c12c01d66705d8fbd3bdfb1c6112
>>>>>> 1
bundle submitted, waiting 0x012ca7ac493afc4bf288bb9cde4b49d521d1c12c01d66705d8fbd3bdfb1c6112
Wait Response: BlockPassedWithoutInclusion
>>> 0x012ca7ac493afc4bf288bb9cde4b49d521d1c12c01d66705d8fbd3bdfb1c6112
{
bundleStats: {
isHighPriority: true,
isSentToMiners: false,
isSimulated: true,
simulatedAt: '2023-02-12T08:03:16.241Z',
submittedAt: '2023-02-12T08:03:16.233Z'
},
userStats: {
all_time_gas_simulated: '',
all_time_miner_payments: '',
is_high_priority: false,
last_1d_gas_simulated: '',
last_1d_miner_payments: '',
last_7d_gas_simulated: '',
last_7d_miner_payments: ''
}
}
>>>>>> 2
bundle submitted, waiting 0x012ca7ac493afc4bf288bb9cde4b49d521d1c12c01d66705d8fbd3bdfb1c6112
Wait Response: BlockPassedWithoutInclusion
>>> 0x012ca7ac493afc4bf288bb9cde4b49d521d1c12c01d66705d8fbd3bdfb1c6112
{
bundleStats: {
isHighPriority: true,
isSentToMiners: false,
isSimulated: true,
simulatedAt: '2023-02-12T08:03:16.241Z',
submittedAt: '2023-02-12T08:03:16.233Z'
},
userStats: {
all_time_gas_simulated: '',
all_time_miner_payments: '',
is_high_priority: false,
last_1d_gas_simulated: '',
last_1d_miner_payments: '',
last_7d_gas_simulated: '',
last_7d_miner_payments: ''
}
}
>>>>>> 3
bundle submitted, waiting 0x012ca7ac493afc4bf288bb9cde4b49d521d1c12c01d66705d8fbd3bdfb1c6112
Wait Response: BlockPassedWithoutInclusion
>>> 0x012ca7ac493afc4bf288bb9cde4b49d521d1c12c01d66705d8fbd3bdfb1c6112
{
bundleStats: {
isHighPriority: true,
isSentToMiners: false,
isSimulated: true,
simulatedAt: '2023-02-12T08:03:16.241Z',
submittedAt: '2023-02-12T08:03:16.233Z'
},
userStats: {
all_time_gas_simulated: '',
all_time_miner_payments: '',
is_high_priority: false,
last_1d_gas_simulated: '',
last_1d_miner_payments: '',
last_7d_gas_simulated: '',
last_7d_miner_payments: ''
}
}
>>>>>> 4
bundle submitted, waiting 0x012ca7ac493afc4bf288bb9cde4b49d521d1c12c01d66705d8fbd3bdfb1c6112
Wait Response: BlockPassedWithoutInclusion
>>> 0x012ca7ac493afc4bf288bb9cde4b49d521d1c12c01d66705d8fbd3bdfb1c6112
{
bundleStats: {
isHighPriority: true,
isSentToMiners: false,
isSimulated: true,
simulatedAt: '2023-02-12T08:03:16.241Z',
submittedAt: '2023-02-12T08:03:16.233Z'
},
userStats: {
all_time_gas_simulated: '',
all_time_miner_payments: '',
is_high_priority: false,
last_1d_gas_simulated: '',
last_1d_miner_payments: '',
last_7d_gas_simulated: '',
last_7d_miner_payments: ''
}
}
>>>>>> 5
bundle submitted, waiting 0x012ca7ac493afc4bf288bb9cde4b49d521d1c12c01d66705d8fbd3bdfb1c6112
Wait Response: BlockPassedWithoutInclusion
>>> 0x012ca7ac493afc4bf288bb9cde4b49d521d1c12c01d66705d8fbd3bdfb1c6112
{
bundleStats: {
isHighPriority: true,
isSentToMiners: false,
isSimulated: true,
simulatedAt: '2023-02-12T08:03:16.241Z',
submittedAt: '2023-02-12T08:03:16.233Z'
},
userStats: {
all_time_gas_simulated: '',
all_time_miner_payments: '',
is_high_priority: false,
last_1d_gas_simulated: '',
last_1d_miner_payments: '',
last_7d_gas_simulated: '',
last_7d_miner_payments: ''
}
}
>>>>>> 6
bundle submitted, waiting 0x012ca7ac493afc4bf288bb9cde4b49d521d1c12c01d66705d8fbd3bdfb1c6112
Wait Response: BlockPassedWithoutInclusion
>>> 0x012ca7ac493afc4bf288bb9cde4b49d521d1c12c01d66705d8fbd3bdfb1c6112
{
bundleStats: {
isHighPriority: true,
isSentToMiners: false,
isSimulated: true,
simulatedAt: '2023-02-12T08:03:16.241Z',
submittedAt: '2023-02-12T08:03:16.233Z'
},
userStats: {
all_time_gas_simulated: '',
all_time_miner_payments: '',
is_high_priority: false,
last_1d_gas_simulated: '',
last_1d_miner_payments: '',
last_7d_gas_simulated: '',
last_7d_miner_payments: ''
}
}
>>>>>> 7
bundle submitted, waiting 0x012ca7ac493afc4bf288bb9cde4b49d521d1c12c01d66705d8fbd3bdfb1c6112
Wait Response: BlockPassedWithoutInclusion
>>> 0x012ca7ac493afc4bf288bb9cde4b49d521d1c12c01d66705d8fbd3bdfb1c6112
{
bundleStats: {
isHighPriority: true,
isSentToMiners: false,
isSimulated: true,
simulatedAt: '2023-02-12T08:03:16.241Z',
submittedAt: '2023-02-12T08:03:16.233Z'
},
userStats: {
all_time_gas_simulated: '',
all_time_miner_payments: '',
is_high_priority: false,
last_1d_gas_simulated: '',
last_1d_miner_payments: '',
last_7d_gas_simulated: '',
last_7d_miner_payments: ''
}
}
>>>>>> 8
bundle submitted, waiting 0x012ca7ac493afc4bf288bb9cde4b49d521d1c12c01d66705d8fbd3bdfb1c6112
Wait Response: BlockPassedWithoutInclusion
>>> 0x012ca7ac493afc4bf288bb9cde4b49d521d1c12c01d66705d8fbd3bdfb1c6112
{
bundleStats: {
isHighPriority: true,
isSentToMiners: false,
isSimulated: true,
simulatedAt: '2023-02-12T08:03:16.241Z',
submittedAt: '2023-02-12T08:03:16.233Z'
},
userStats: {
all_time_gas_simulated: '',
all_time_miner_payments: '',
is_high_priority: false,
last_1d_gas_simulated: '',
last_1d_miner_payments: '',
last_7d_gas_simulated: '',
last_7d_miner_payments: ''
}
}
```

Start by tracing the flashbotsProvider calls to signBundle, simulate, sendRawBundle, and getBundleStats in the reported example. Compare the target blocks used for simulation and submission, then determine whether isSentToMiners=false is expected for these submissions; done means documenting the cause and the expected bundle status behavior.

Written by the indexing model from the issue text.