Just tried Ubuntu 19.04 with kernel v5.0.0-13, looks like the problem had been fixed there as I can't reproduce the issue.
However the issue is still there in Ubuntu 18.04.2 LTS with kernel v4.18.0-15.
Just tried Ubuntu 19.04 with kernel v5.0.0-13, looks like the problem had been fixed there as I can't reproduce the issue.
However the issue is still there in Ubuntu 18.04.2 LTS with kernel v4.18.0-15.