Catt seedling rootrot

[Kailyn]

Hello
I have recently posted some pictures on my new catt seedlings 2/3 are doing great with visible root growth and a new shoot. The third I hadn't seen any signs of new roots and thought it might be too deeply potted when I took it out of its pot to rise it up slightly I noticed it has A LOT of root rot. They have all been treated the same so I am not sure of the cause. I am attaching pictures and want to know if i should proceed with it like i would with a root rotted phal (cut the bad roots off use cinnamon on the cut end and a rooting hormone to help it grow new roots?) I REALLY don't want to lose my baby. I have been putting them on a warming pad (along with an old phal I'm trying to encourage more root growth in). Any suggestions or guidance? it is sitting on my kitchen floor as pictured waiting for me to get brave, while I run to OB for moral support....