I haven't a clue what the correct Hebrew font should look like, it's all Greek to me (bad joke, sorry).
Since only some paragraphs display correctly I suspect you have a problem with formatting.
- Try Ctrl + A to select everything, then
Ctrl + M to clear direct formatting.
- Failing that, you should select a bit of the normal text and examine
the differences (if any) between the Paragraph Styles, found in
Format -> Paragraph...
Note that if you try the first thing and lose the desired formatting, (e.g. all the text is now 'wrong') you can press Ctrl + Z to undo, then carefully compare any formating differences as explained in step 2, to apply the desired effect.
This probably is a bug so I'll cast another close vote (bugs are off-topic here), but if this fixes things please update your question. If it's not a bug I'll be happy to vote to re-open it.