So I'm hoping I'm not the only one experiencing this but I am not able to complete Modern Times. The strange part is that I have completed it normally earlier today in a failed attempt to get the Platinum medal but instead got gold (same problem as most where people have trouble with the no healing bit). However the issue seems to be that this time later this day I attempted it and seeming did it flawless with no issue... except the mission will not finish.

It's not an endless horde like how I've heard others mention, the waves just... stop. The mission won't complete after 5 minutes either so I can earn the Platinum medal. Is this a glitch specifically with the medal or... what? I'm not sure what else it could be.

To be specific I was able to nab both mobile MG's and have them in the final battle. Not sure if that would somehow change anything but I don't know any other difference in my earlier play through this morning and later today.

Does anyone know of any fixes to this issue? Or possible causes?