Geonor infinite vine arrow bug

When fighting Geonor you can get the first phase of Geonor to have the vine arrow damage over time on him permanently until he goes to the second phase. This seems to happen if he transforms from a wolf back to a human as:

1. Geonor leaves the range of the vine arrow.
2. The vine attached to Geonor times out.

Clip of it happening
https://youtu.be/oYQT8PlD99Y