Ah yeah, one player encountered that issue in both 64 bit and 32 bit versions. I'm not sure why that happened. I have a theory that it may have to do with some computers or keyboards or something being from the EU causes that weird movement glitch. Cause the one guy that found that bug was from the EU and the other testers were from the US. The US ones never encountered that bug while the EU tester encountered it. Not sure if you're in the EU or US so I don't know if this theory of mine is true.
Yeah I'm from EU, so your theory might be true. However on my laptop both versions ran without the movement glitch. Probably what happened is that it changed language on the keyboard settings and then Unreal Engine didn't recognize the input key. Hopefully that helps!