Likewise, if a PC has a Summons up, and an enemy casts DM on the PC, and then the summons disappear, which the PC didn’t think would occur, that’s a big discrepancy.
At least for that, I am the wrong person to ask, as casting dispell magic to break concentration is within stuff I would allow.
My sig is something witty.
78% of DM's started their first campaign in a tavern. If you're one of the 22% that didn't, copy and paste this into your signature.