Discord and DCS trigger a crash to each other

When I'm playing DCS (Digital Combat Simulator) Steam Edition with the app "FaceTrackNoIR", Discord seems helping them crash.

When I play DCS on multiplayer server more than 2 hours, FaceTrackNoIR firstly stops working, and DCS crashes eventually. Then, every time they crash, Discord pops up. When Discord isn't running, those two apps don't crash so frequently.

After crashing, Discord automatically restarts itself, but the stability is completely lost and it keeps freezing. Since there's no error massage neither on DCS nor on FaceTrackNoIR, I cannot specify exactly what triggers it. I firstly thought the memory shortage caused it. However, it's not likely. When the crash occurs, 27GB of RAM was being used.

My current environment is following:

OS: Windows 10 Enterprise x64 [20H2, 19042.2130]

CPU: Core i5-9400F

RAM: DDR4-2666 32GB

GPU: NVIDIA RTX 2060 Super

Discord version: Stable 156904 (5674e1f)

Steam version: v020 (API), 1666144119 (Package)