Well that's how it's supposed to work, right?
Some wonkiness.
Regarding the Taki gun move, I was using Xianghua's 2A+B which GI's low hits (Taki's gun isn't a low). X's 4A+B and 6A+B which GI high&mid horizontals or verticals (respectively) do not work against Taki's gun. But you can see in the first clip the “Guard Impact” text notification doesn’t appear like it normally does, so the clash affect apparently cancels out the GI. But in the second part it’s just a regular 6G guard impact and the notification appears as usual. The final two clips are just showing off backwards-facing auto-GI and backwards-facing clash. The combo where I use 6A+B to auto-GI Taki’s RE for a LH isn’t wonky I just felt like including it.