1) I have the same worry about posting too much, but I do genuinely enjoy getting to read about Chewie and Woolly!
2) I had something similar happen between my two buns seemingly out of nowhere while my bun Eve was getting to be herself again after being spayed, only she was the one who was afraid. Just one day out of nowhere, Theo (who had previously been comforting her during recovery) started chasing her and humping her (he’d been fixed for months). She even seemed scared of him and hid under my bed and refused to go back into their cage when Theo was in there even though she’s usually more than willing to do so (they get treats when they go in their cage with little prompting.)
With my personal experience, I watched them closely for a couple of days to see if anything else would happen, but luckily nothing else happened besides Eve getting a bit annoyed by Theo sometimes, and after two days they were back to being best buds.
A helpful user whose name I can’t think of atm suggested that it could be hormones flaring up, and they might be seeing if they really are meant to be bonded or not. In that case, it was said they should be separated as to not watch the bond further break, and do bonding exercises again to solidify a healthy bond. I would personally first try just putting their enclosures next to one another’s and seeing if that would help; that’s the only bonding tactic I needed to bond my buns with (seeing as they were both 3 or 4ish months old it’s a helluva lot easier, though), so possibly since they’re already bonded you don’t need to use as extreme of tactics?
I would personally just keep a very close eye on them for the next couple of days, and if anything happens, separate them and try bonding again after a bit. Hopefully it was just the one incident!