Lately, in quickaikido and public aikido, my hands will deflect off the target regardless that they are grabbing. occasionally they will work again, and correctly latch onto whatever they find. However, it's getting extremely annoying to loose to yellow belts because my grabs bounce off of them and coming flying into something else, sometimes my own body.

Can you please post a replay? I have never heard of this before the only grab glitch I can think of is when you are both grabbing each other and one lets go and the grab just pretty much breaks for both people, this is just an in game bug if I am correct.

That is not a glitch. If both of the players are going for contracted wrists at the very first frame, you'll be able to ungrab the left hand, it always was like that.

Attached a replay below.

If you want to avoid that, simply contract your wrists, but do not grab.

If you're not talking about this, then you just most likely accidently ungrab or something. Make sure you don't press 'v'.