I also tried with these kernels:
5.0.0-44.48~18.04.1 4.18.0-25.26~18.04.1 4.15.0-96.97
The same behaviour happens.
I also tried with these kernels:
5.0.0-44.48~18.04.1 25.26~18. 04.1
4.18.0-
4.15.0-96.97
The same behaviour happens.