The field in Filter -> Highlight Field -> Duplicate Acoustid is not high lighted when there are dublicate acoustids!. Maybe that happens with Duplicate MB Recoding ID too.
Highlight Fields not highlighted
Hmm, I test that only last week but does appear to be broken now https://jthink.atlassian.net/browse/JAIKOZ-1390
Checked works in 11.1 but not 11.2 so I think it is connected to laf switch and rendering of table cells, maybe the striping.
Removing JaikozTable. prepareRenderer () fixes it but then we lose the stripes.
Maybe you can use a switch in the preferences, if someone likes stripes or highlight fields (perhaps these with lines between the rows and columns)