Modded Server Issue with random command

[Beo]

I have a custom mod server with 250+ mod and running with a party size of 4-8 player at once, using forge version 47.2.0 with minecraft 1.20.1.
The beginning of a couple week was normal.

And now we are facing issues:
+ random notifications from the server like: " <Player> is moving too fast ", Random generated symbols which doesn't make sense on server message.
+ server summon monster in command line.
+ player lost most of their item and get teleport 10.000 block away from their base.
For further clarification this is not a troll from one of my running ops, we all confuse and try to find some way or some information for this solutions.
 

Edited April 27 by Beo