Hello,
do you see that on the data_engine probe or any oracle monitoring probe?
Do you have any other connection like UIM SOI connector accessing the database?
When searching in the our database I found a hit related to data_engine, where such a problem disappeared after entering correct user details and a cold start of data_engine (deactivate/activate).
Also credentials in the UIM SOI connector needs to be adjusted, if you have that.
If that does not help, I suggest to reach out to support within a support case.
Regards