It does sound like root rot. Sometimes caused by non-sterile conditions in the water.
I'd pull them out. cut back and replace in sterile water if they need additional time in the water.
I've had some that long and it's fine. The vinegar base keeps things safe. (long time canner and food preserver here)
melody
Kalanchoe Species, Flaming Katy, Christmas Kalanchoe, Florist KalanchoeKalanchoe blossfeldiana
Waihi Mitre10
It does sound like root rot. Sometimes caused by non-sterile conditions in the water.
I'd pull them out. cut back and replace in sterile water if they need additional time in the water.
Viola, Pansy 'Cats Plus Purple and White'Viola wittrockiana
Waihi Mitre10