Ya, inconsistent connect issues are a pain to sort out. I do see that you're using TB Driver 1.41.1353.0 when ASUS only supports up to TB Driver 1.41.1193.0 on your MB. Don't know if that's causing an issue but it certainly did on my MB. I had to uni...
Only a suggestion because inconsistent TB connection issues are typically caused by TB cable issues. Plus, it's usually simple to swap cables and test if that's the case.
Of course the issue may have nothing to due with the cable, as you've noted, an...
@DezM Have you tried switching your Thunderbolt cable end for end by chance or even a different TB cable? I know it seams silly but I've had inconsistent TB connections in the past like you've describe and the solution was simply to shut down my PC, ...
@Steavis @raugam111 @DezM @Jiaszzz_ROG
UPDATE: Hey Everyone! After doing a deep dive into the TBex4 controller and my MB's BIOS I was able to get the ThunderboltEX 4 card working as it should. Keep in mind that my solution may not work for you and w...