Hi John thanks for the reply,
My system specs; AMD Ryzen 5 3600 , with 16GB of RAM with an SSD.
Latency Monitor; "Conclusion: Your system appears to be suitable for handling real-time audio and other tasks without dropouts."
I've optimized my system for audio following this guide https://www.sweetwater.com/sweetcare/articles/windows-11-pc-optimization-for-recording/
My interface is a Zoom R8 so I can only run WASAPI as a driver mode. I know some people on this forum have had issues with this interface.
I am able to add single pedals and amps in TH 3 but seems like cabinet simulation causes the "crash"/level peak problem.
It's almost as if adding the cabinet cranks the signal to ∞. The guitar is patched directly to the Zoom R8 with no insert effects or anything fancy.