Text Selection Problem in Android

I'm having a problem with text selection in Android that emerged only in the past few weeks. Often, when I drag to select text I want to highlight and the context window (highlighters/copy/note, etc.) opens as intended, the window moves down in the Bible passage and the section I've selected is no longer visible--or only partly visible. This makes it difficult to tell whether it's still selected, I didn't select what I intended, etc. I have to blindly add my highlighting and then review to make sure I got it right.

I hope this can be corrected. It's not a big deal, but it's causing extra steps simply to highlight a passage.