When I select several bars, as shown below,



and then right-click on the first bar in the selection to choose an action to perform on those bars (such as copy or delete), all bars except the bar you right-clicked on will be deselected. This seems to happen almost all of the time although I have seen it not happen when I was trying to reproduce it and check for any patterns in bar selection. This happens in BIAB 2018 and 2017 (not sure about before that).

And before someone can say "just click a different bar", yes, I know I can do that but it is natural to select and then right-click the beginning of a selection so this is a bug that needs to be addressed.