RODI - problem with DI canisters

[SteveConn]

After over 5 years without issues, today, when I went to refill my DI canisters (I have 3), I noticed they were all expanded inside the holder. One (the first in the series) was actually burst inside the holder with DI resin spilled out. I cant get the other 2 out of the holder and will likely have to break the canisters apart to use the RODI unit again.

Has anyone ever had this issue or any ideas of how this happened?