Issues with saving and recalling Data- missing or "lost" data

URL of experiment: https://gitlab.pavlovia.org/vanlou22/wordjumbler

Description of the problem: Not all of the data from my participants appears in the data folder. I know that certain people have taken the experiment but their data remains absent. Occasionally, my data folder will also be emptied. I can usually find past data in the “history” folder but I am wondering why/how data doesn’t get saved properly and why/when the folder would be emptied.

Thank you!