Modpack version
1.81a

Issue
Quests for me reset, but for the world owner it stays the same. I had 90% of the quests complete, and now they are all gone

We use the issue tracker exclusively for bug reports, development and feature requests. However, this issue appears to be a support request. Please use the support channel on our Discord to get help.

There are quest progress backup files in the world folder, and additional quest progress backup files in the backups folder :)

A lot of things do not work very well in LAN worlds, I highly recommend that you switch to a dedicated server if possible.