@JohnP @michal.fita I merged the two issues. Thanks for the report. 
What do you think: Could this also be the same issue as reported here? My first message doesn't appear in the list
Does this only happen with the vertically aligned reading pane, or also in the other views?
I will See, if I can reproduce the issue on a Windows Machine. I can’t promise anything, as I am usually not developing on Windows.