There has always been support for Hebrew punctuation (nikud, vowels) in the Hebrew keyboard layout in Ubuntu. They were located on the top (numbers) row of the keyboard (as in Windows) and were accessible in combination with the 3rd-level key.
Since I switched from the previous LTS version of Ubuntu to Ubuntu (Mate, I don't think it makes any difference) 16.04 the punctuation signs are not in the right place. Most of them are now accessible using different letter keys (S,Q,J,X etc.) when combined with the 3rd-level key.
Any idea what happened and whether I can somehow get these signs in the right place?
(this question was first asked here:
https://ubuntuforums.org/showthread.php?t=2338558 but was never answered)