Hey brooo, I see why they call u Mind-Brain!!! Apparently Root Motion was the CULPRIT!!
Ok, back then I honestly did check the animations’ root motions themselves; which wasn’t ‘selected’, so I had ruled it out.
So I basically began resetting everything and had initially thought it was a problem with the 'Velocity/Speed. But upon reaching down to your POST, I decided to look into the Anim BP; was going through it with a fine-tooth comb, and BAM! Inside there> Anim Preview Editor> ‘Root Motion Mode’ was set to ‘Root Motion from Everything’ which I changed to ‘Root Motion from Montages Only’ and I started MOVING again. I didn’t put everything back as it were(ughhh just the thought) and fully tested, but it’s a start, right?!