Odd rhizome and ugly pseudobulb

[SaraJean]

I’ve only been growing cattleyas for about a year so I have no clue if this is normal behavior or not for this genus. When I went to repot one of my C. walkerianas I cut off one of the ugly, rootless back bulbs that wasn’t really fitting well into the new pot and would have wound up getting partially buried (main plant still has about 8 p-bulbs, normally I don’t cut off any p-bulbs unless they are dried up or squishy). There is a weird band of brownish/red color on the inside of the rhizome and the bulb is shriveled and has black/brown markings on it.

Sooooo, is any of this normal on older growth? Maybe caused by dehydration? Or is it an indication of some sort of fungal or bacterial infection? Some of the other back bulbs have a similar pattern but I didn’t go hacking them off just yet.