Hundreds of gigs free on drive so definitely not a write error. I had an audio clip vanish yesterday too and I immediately went and looked in the history and there was no undue and nothing in the audio folder, like it never happened. And recently I was recording two tracks simultaneously and one vanished and one remained.
For a while the clips were vanishing *every single time* the very first time I'd record, but then the recordings would stick thereafter. But now, after doing various stuff like unchecking that "allow arm during record" box and increasing i/o buffer currently @ 1024, the clips don't vanish the first time usually anymore at the moment anyway and now it's a more random but frequent thing.
I've been doing exactly what a guy in another thread who was having this problem was doing. He said he was using BIAS FX/AMP and saving instances of it as track templates and he was able to recreate this problem by not saving BIAS FX in the template; when BIAS FX was not saved as part of the track template, but added after the fact, his recordings stuck, but when BIAS was saved as part of the template they vanished - and this was all when recording onto the very track that was initiated from the template. For me these clips are vanishing randomly now, but not usually at the beginning anymore like they were doing, so it's hard to test if BIAS is the culprit in my case.
Next time this happens 😠I will check the audio folder and history and cache again, but really this is pretty awful.