I'm playing the latest curse version of gt:new horizons (1.7.10)
forge version is 10.13.4.1614
BQ version is 1.0.173
Right after completing a quest (not claiming), while the in game overlay appeared to tell me the quest was complete, I closed my instance of minecraft. This caused a few quests, unlocked or not, to reset to (I guess what is) the "default" quest, called "new quest", with a nether star as symbol, and "no description" being the only thing that appears when I open them.
Also one completed quest now appears as unclaimed rewards but when I open it it is shown as incomplete.

Please note that I am not very active on github, I might not answer before long. I'll try to check this more often tho.

Here are some screens :

Thanks in advance.