I can confirm this. The following test note works perfectly in Joplin. Jumping to any of the headings works, but when creating a PDF, the first 3 headings don’t have a link.
It’s a bit strange though, since the link with the unicode character (the last one) works without issues.
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# 日本語のテキスト
Text<br><br><br><br><br><br><br><br><br>
# Немного текста на русском
Text<br><br><br><br><br><br><br><br><br>
# et voilà
Text<br><br><br><br><br><br><br><br><br>
# heading (special)
Text<br><br><br><br><br><br><br><br><br>
# another @ char
Text<br><br><br><br><br><br><br><br><br>
# a lot of special characters !@#$%^&*
Text<br><br><br><br><br><br><br><br><br>
# test !
Text<br><br><br><br><br><br><br><br><br>
# test %
Text<br><br><br><br><br><br><br><br><br>
# unicode 🔥 character
Text<br><br><br><br><br><br><br><br><br>
---
<br><br><br><br><br><br><br><br><br>
<br><br><br><br><br><br><br><br><br>
<br><br><br><br><br><br><br><br><br>
<br><br><br><br><br><br><br><br><br>
<br><br><br><br><br><br><br><br><br>
I’m pretty sure Laurent also uses French. I can add a French accent to my test as well, but I thought it was not necessary, since it already shows the problem at hand.
But, I’ve changed the test file…
It could be a combination of a few things actually. Currently I have no clue what’s going on. Maybe Laurent has an idea.
But I’m sure, we’ll figure it out somehow.