Dunno if i can help troubleshooting here, but I'm also having this problem its not the end of the world but it does happen, today i moved host provider and when reinstalling i found with all my addons installed workshop and scriptfodder that it ran fine with ulib and ulx, however when I added my data files for players data for the addons and gmod directory itself including ulx and ulibs data files, the issue reappeared, it seems to do this when a player is loading in, respawn or is assigned a rank, maybe there is an issue where when a text file gets x amount of lines it becomes hardwork for ulib/ulx to search through the records to get x information in x location. i could be talking completely out my ass here, any chance of a mysql module in the future?