Wrong text artifacts in table header

Some changes in recent versions of JavaFX have broken my table display. A part of the last table row seems to be duplicated in the header section of the table. This always worked until 19-ea+4 and was first broken in 19-ea+5. Then it seemed to be fixed in 19-ea+9 (maybe just hidden because of other issue) but is now broken again in 19-ea+10 (and also 20-ea+1) The attached screen shots show the effect.