Cursor offset problem

[CharType]

I'm having a problem with GIMP where the selection on my screen is significantly above where my mouse cursor is. This doesn't happen 100% of the time but it happens frequently, and usually right after I open GIMP.  I have attached a screenshot that shows what I mean. This seems like a bug. Is there a way to fix this, or should I submit a bug report? Thanks.

I am using GIMP 2.8.18 on macOS Sierra 10.12.6.