Question / Help Frame rate (FPS) drops when using OBS with Elgato Game Capture HD60 S

This is not an issue caused by the April update, I am on version 21.1.2. I have been in contact with Elgato and briefly, the issue went away (I feel like it may never have at this point) after many emails and attempted solutions. However, I discovered this issue only exists in OBS.

Every 30 seconds, the frame rate drops for a moment, then goes back up.

Video (currently uploading, 2 hours left):
OBS Log:
Elgato SupportInfo file: