For me, I have had a similar issue. Running a Python bot.
After 2500 ticks, I would end up for 8 people because my bot sends the commands to late it seems. Calculation time is between 10-15ms max. If I run the same bot on my PC but I turn down the Tickrate to 1000ms, I get like a bazillion people on my map. Which is odd…
I think I know the problem though:
https://forum.entelect.co.za/t/python-and-signal-response-time-issues/1386?u=gatkramp