Starting 20+ periodic tasks results in reduced performance, anyone else encounter this issue and have any resolutions?

[Enginerd0]

So here is my current setup:
Python: 3.7
CAN interface: Vector 1640A

My problem is the following, when you start many periodic tasks there starts to be reduced performance where periodicity may start to waver, as well as data packets not delivering on time. For example I started 20 periodic tasks where each message has a counter that goes up to 3 and restarts at zero. I noticed some transmission issues where it may skip values every now and then and now always transmit correctly, I need these counters to all be in sync and send at the same time every period. Let me know if you have any solutions, thanks!