JabRef version
JabRef 5.0-dev--snapshot--2018-12-31--master--a4e735b38
Windows 10 10.0 amd64
Java 1.8.0_172
on
Windows 10

Steps to reproduce the behavior:

1. Options -> Preferences -> Entry Table Columns -> I set the widths -> Click both Update to current column width as well as current column order. I have enabled rank, relevance, quality.
2. Put computer to sleep, or change to different window.
3. When I re-open JabRef, the pixels of the entry table are slightly off, making, e.g. the read status almost invisible (see attached screenshot).
4. When I correct it, after switching off and coming back to JabRef the issue is back again.