Do you have the same issue if you follow the OP’s steps to reproduce it?
YES, though not VR, standard 3D.
Provide extra information to complete the original description of the issue:
I’m flying with the ATR in the Colombian region (Xbox/Xcloud), very mountainous and consequently intensive use of terrain radar. When taking off from SKCL (CALI) towards SKBO (BOGOTA) I noticed the simulator extremely slow, I even thought it was something serious, it was then that I had the idea to turn off the terrain radar and suddenly the simulator went out of the extremely slow condition . I partially solved the problem by going to the tablet options and decreasing the TAWS resolution to 50% (Radar Terrain Resolution) and it improved a little.
If relevant, provide additional screenshots/video: