Message routing not working for null value in properties

I have a message route query on iotHub like below:-
IS_OBJECT($twin.properties.reported.deviceOperations) OR $twin.properties.reported.deviceOperations = null

Expected result:-

Message should be delivered to the endpoint having twin like below:-
```
"properties": {
"reported": {
"deviceOperations": {
"6a8e9bb0-631b-42ad-a3ec-7c8fe4a67c6c": {
"requestType": "fileDownload",
"metadata": {
"key": "value"
},
"blobName": "",
"progressUpdate": false,
"de88a4ed-6eb0-483b-a929-cf0ae544e0df": {
"wipe": true
}
}
},
}
```
This is getting delivered and is working fine due to the `IS_OBJECT` query in message routing

The problem/issue arises in the second query for json below
```
"properties": {
"reported": {
"deviceOperations": null
}
}
```
this is not getting delivered to the endpoint but it should due to this condition `$twin.properties.reported.deviceOperations = null`.

And the reported property deviceOperations is getting cleared in twin but somehow not delivered to the endpoint.
Also when i put the message routing query as `true` I get the message in my endpoint as below
[EventHubMonitor] [9:21:31 AM] Message received:
```
{
"version": 6,
"properties": {
"reported": {
"deviceOperations": null,
"$metadata": {
"$lastUpdated": "2024-11-26T03:51:31.5199729Z",
"deviceOperations": null
},
"$version": 3
}
}
}
```
So only the condition `$twin.properties.reported.deviceOperations = null` in message routing doesn't work

Am I missing anything?

Note:- The test works in the Azure UI portal for above JSON.