Deleted translations

Good evening, I translated the Ultimate Member plugin with Loco Translate for 3 days. During these 3 days I did not find any problems and the translations were changed correctly. But today the 1361 translated strings have been reset, but not immediately while I was working on the ultimate member. What could have happened? Is this an isolated bug? So I can hope that retraining then does not happen again. Or is there an incompatibility between the 2 plugins involved?
Thanks so much