The following process creates a bug,
which only appears when exporting to PDF:

1) Write a few words (in Hebrew) and add 2 footnotes
2) Set 'No break' to one of the characters between the 2 footnote references
Bingo!
Only it the PDF will the bug appear -
The character (comma\colon\letter) after the first comment - is doubled!!!

In InDesign everything looks normal!
You only discover the mistake in the PDF/after printing!!