I checked on my potted irises and I don't know what happened. The fans had fallen over on several of them and they were turning brown. The rhizomes were not soft, or mushy...but once again they were spongy. I've had this happen in the ground before, but never in a pot. Nor never this many irises at once. Most of them were newly potted gifted irises too!
I removed them from the pots, tossed the soil into the field and trimmed and cleaned them. What little is left of the rhizomes are currently soaking in diluted bleach. A lot of them the fans just fell right off.
So there will be a list of the lost coming soon.