Running mainline kernel from mainline archive, and no issue so far. So a problem in the ubuntu kernel. Current version:
jos@vaio:~$ uname -a
Linux vaio 5.1.4-050104-generic #201905220633 SMP Wed May 22 06:36:13 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux
Running mainline kernel from mainline archive, and no issue so far. So a problem in the ubuntu kernel. Current version: generic #201905220633 SMP Wed May 22 06:36:13 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux
jos@vaio:~$ uname -a
Linux vaio 5.1.4-050104-