I am not sure how to pass along this feedback but recently, after years of reliable service, my postprocessing of Joomla backups using Wasabi starting failing with 'network unavailable' errors. I tried a number of things (new bucket, new zone, etc. but it didn't seem to help.) A couple of days ago, I disabled dual stack option and since then, postprocessing of my backups (5 sites) all seem to be working. It could be total coincidence so I'm going to keep running tests and monitoring backups. The issue was mainly with my largest files .j08 @ 2G. The symptom was that the backup would succeed, but post processing would not send all of the .j0x files to Wasabi. The error logs also contained network unavailable errors. The errors were sporadic but more frequent with larger backup sets.
I'll keep monitoring but it seems like maybe Wasabi has an issue with Dual Stack... wanted to pass this along in case it helps someone (or your support group) in the future.
