Transactions get stuck on sending

Some of transactions get stuck on sending(using wallet plugin)
`wallet.resend()` does not work, but on node restart transactions appears in network
```
[error] (node) Verification failure: txn-already-in-mempool (code=alreadyknown score=0 hash=)
[warning] (node) Verification failed for tx: .
[warning] (node) Attempting to broadcast anyway...
```
+ logs on node restart and `wallet.resend` are the same
using `rojii/bcash#schnorr`

Reproduce the issue using the wallet plugin and the rojii/bcash#schnorr branch, starting with wallet.resend() and the reported node logs. Compare resend behavior with the node-restart case and trace the txn-already-in-mempool verification output. Done means the stuck transaction can be resent without restarting the node and the reported failure no longer occurs.

Written by the indexing model from the issue text.