Hi,
I had the problem, that the Custom Css field in the avia elements was not showing up anymore after updating to 2.9.2.
Just wanted to let you know what the problem was:
I had changed the functions.php to debug mode to show the avia shortcodes: https://kriesi.at/support/topic/export-pages-to-another-installation/#post-320861
This was overwritten by the update. Now I changed the functions.php again and it works. The custom css shows up again.
Just in case anyone has the same problem.
Cheers,
Michael