The name of the ticket is stupid, I'm sorry, it's more than that.

After a lot of testing with various cards in debug mode I found that one of the problems with cards like Resilient Wanderer , Grotesque Hybrid or cards like Jareth, Leonine Titan , or even Mother of Runes is that they can activate their abilities in response to too many different things.

One of the most common causes of misplay is trying to activate their ability whenever their owner is targeted by something. This often causes them to assign a random protection:color to themselves when their ability resolves. I assume this is because upon resolution of their ability it turns out no protection is relevant as they aren't the target and they can't in any way help the target of whatever is on the stack. An example of this would be Mother of Runes taping herself to give herself irrelevant protection from red in response to her owner being targeted with a Mind Burst.

After a lot of experimentation, it also seems that having creatures which pump themselves (or give themselves combat ability via an actvated ability) is also likely to cause these creatures to activate their abilities and assign random protections from color, as well. It looks like Jareth, Leonine Titan interprets activations from Stillmoon Cavalier as prompts to use his ability. I suppose it might be because Stillmoon Cavalier is somehow being targeted by his own ability activations and Jareth can't tell it's not himelf being targeted and/or that he can't do anything about it so he activates his ability.

I believe I could recreate situations and screenshot them, or even make a video if that would help, or write detailed instructions as to how to recreate it if it's any help.