fyi: If it was treated as a bug, you'd firstly be asked to check it does the same with the latest Ubuntu 18.04.3 (with 5.0 kernel & updated software-stack).
Bug reports though are primarily about finding and fixing bugs for future users. Support (questions) are about fixing your current problem and raising bug reports if they are deemed necessary.
fyi: If it was treated as a bug, you'd firstly be asked to check it does the same with the latest Ubuntu 18.04.3 (with 5.0 kernel & updated software-stack).
Bug reports though are primarily about finding and fixing bugs for future users. Support (questions) are about fixing your current problem and raising bug reports if they are deemed necessary.