So subfloor is level. That's good. Room is square? Unlikely but possible. Did you scribe the planks installed for the last wall?
To me, it looks like too much space between some of the joints and some of the pressure from movement is coming up where there are loose joints. Especially with the motorized scooter wheels are grabbing planks for traction and then pushing/pulling the loose planks. Also,
you pinned down some planks to the subfloor with nails and glue ? That would further explain the floor having uneven movement and shifting where there is the most slack.
What's beneath the particle wood subfloor material? You've got non-waterproof planks with bad joints. Inevitable water spillage which will cause swelling and other issues with the subfloor. In turn, negatively effect the shifting of the vinyl planks further. That's only guessing without actually seeing it and guessing on installation methodology.
If it was my decision, I'd rip it up and start over. Take your time and ensure every single plank and its corresponding joint is absolutely solid. If you decide to go that route, then it would be an excellent opportunity to consider a sealant for the subfloor that WON'T cause it to swell. Very limited options for that unfortunately and most, if not all options, would be quite expensive.
I imagine this will be something that continues to happen and it will be impossible to fix after there is a giant tank keeping planks from moving.