I got stuck in this bug twice today. You interact with an object such as a terminal or power armor and when your character begins to step into position to use it they get stuck on the environment and stick in the walking animation forever, unable to start the interaction. As far as I know there isn't a way to cancel the interaction or move your character around the obstacle manually. In my case I had to reload a save.

And for reference the terminal i had issues with was the one in the basemant of the museum of freedom. I was in Sanctuary trying to get into my power armor from in front of it when I got stuck on the armor itself.

I encountered both the basemant terminal and front Power Armor mounting glitches for myself last night, but luckily the fix I found was very simple: whenever you find yourself stuck in a looping animation, press the "Esc" key to go the main menu, then press it again straightaway to resume the game. The animation should then finish playing without any more problems!