It's a bit tricky re the issue you mentioned, while I assume your Solr service is functioning properly.
To verify this, please ensure that there are no
errors or exceptions in the Solr logs.
If there are no Solr error messages, the problem may be on the
Sitecore end. Therefore, please check the Sitecore logs to see if there are any errors or exceptions.
To eliminate other potential issues, I suggest that you first try to
rebuild all indexes to see if the
master index is broken, which can sometimes happen.
After completing the above steps, please try to reproduce the issue again to confirm if it works correctly.
If the issue persists, I recommend raising a
support ticket to the Sitecore team for further assistance, especially if it's urgent.