As Ben hinted at, make sure you start X-Plane with --num_workers=11. Also, look at the frame profiler, it'll help point at a particular part of the frame rendering that's being slow.
You’re not on Linux so please don’t use a totally unrelated thread for your issue, it’s confusing for everyone.
Step 1. Disable Zink, it’s not supported by CL-650 1.7, and was auto-enabled by LR in 12.1B1.
I’m sorry you’re having trouble, unfortunately this forum has no association with xPilot the Vatsim client. You’ll need to look for support via their Discord.
Walk away from the plane in any direction.
You should be able to use the satellite phone behind the Capt's seat, but due to online data changes this is currently unavailable in the release version (V1.7), but fixed in beta (V1.8).