In my duel I used the ability of "Mecha Phantom Beast Raiten" summoning a "mecha phantom beast token", its level was not raised to 7, since as a result of this it would have to change its level from 4 to 7.
https://duelingnexus.com/replay/e2d9ac3c-3996-4a73-ab5b-3b4fce01d02e
#Mecha Phantom Beast Token
red elbow
lofty fulcrum
It seems that Raitens tokens are not being counted as a MPB token, and youll notice that looking at the ID it has, it does not have " [31533705]" beside it, which is what is shown for cards that are treated as a different card in nexus. It looks like all of the MPB tokens have this except for Raiten's token. Ill do a bit more testing and pass the issue along
hollow swift
lofty fulcrum
Ive reported the issue on Duelist Unite as its present both here and on Omega, so its a database issue they have to resolve.