Ah, that’s really good to know! : D
Hearing that you could walk normally confirmed that something was wrong with my game. and with that, I finally tracked down what the problem was:
Rather than using the default “orient rotation to movement” I instead made my own way of rotating the character to the last direction pushed, and I used a “move component to” node to do it. The node set the actors location to the same location it was already in, and this never interfered with movement until now… So I removed that line of code, and that stopped the teleporting problem.
I still can’t believe how glitchy this made things. I thought by setting the location to the current location, it would just ignore changing location altogether. But apparently not. 
Now as for that capsule trace you mentioned, I think I could make this work for me!
Thanks for your help, red. (This is the second post you’ve helped me on, btw.) x)