Loading a world sometimes get stuck at loading screen.

Sometimes when i try to reenter to my world the game get stuck at loading screen. I need to delete the player data with an external program in order to fix my login again, seems to be some corrupted data with the profile that happens eventually.

I use like 3 or 4 scoreboards, 3 of them are passive, and other one is active counting "seconds" every 20 ticks. In addition to that my world has like 50 command blocks, but it never was a problem before. It happened randomly to me like 1 time per day this past 3 days or so. Random, but it is there.