It seems lemm.ee is missing data that is available in other instances like lemmy.world. Even posts and comments made on lemm.ee itself.
For example, compare the profiles of @sunaurus@lemm.ee on both sites. You’ll notice that on lemmy.world there are more comments more recently.
https://lemmy.world/u/sunaurus@lemm.ee
Edit: as soon as I posted this the data seems to have synced back up again.
Thanks for the reply! Good to know the new version should be solving it and that trick to force a sync. Thanks for running this great instance!