Possible pest on Odontocidium...

[lambo1972]

Hello all! I have a large Odontocidium Wild Willie Pacific Bingo. A month or so ago, I noticed a lot of the dead roots appear to be eaten back by something. I do not have a picture, but I'm pretty sure it's happening. I do not see any other signs outside of the dead/dry roots that were hanging out off the pot have been shortened by something. I doesn't appear the live roots have been touched. Could it just be a bug of some kind that has moved on as it seems to have stopped. I have read a lot about snails, but many mention holes in leaves and flowers. That hasn't happened in this case, just the dead roots are affected. Any suggestions? Thank you!