Sennheiser E604 3Pack

Unfortunately, I bought the 3pack bundle and, after a couple of gigs, 2 of them had the same issue.
When inserting the XLR connector (carefully, by me) the grill detached from the housing, and so did the cartridge.

Important to mention:
*The mics were always carried on a Flyth Pro case with custom foam inserts;
*Always mounted and connected properly, and only by myself;
*The grills are intact. They were not smashed by the sticks or anything else;
*I have used other e604s in the past and never had any problem with them.

The glue cord used to seal the mic is so thin it cannot hold the parts in place properly.
I believe it is a defected serie. Already submitted them to the RMA warranty process.
Anyway, never expected this from Sennheiser.

The sound quality of this mics is known for years. I am pleased by the sound specs but overall they are useless with damaged housing.