Cumulocity connection problems

Hello Community,
is there an improvement or changes to the cumulocity service on teltonika devices.
I have a TRB256 Gateway in use where the Connection to the plattform is not always working and has from time to time connection issues.

Now I have a problem with the push connection it is disconnecting in a random time. There is no pattern and I can’t replicate it.

If I look in the logs there is a information to the error:
ERROR: HTTP post: Callback aborted
WARNING: push: connect failed!
have someone seen errors like this and are there information how to solve this?