I’m not personally knowledgeable in Proxmox, but there have been quite a few reports here of lost pools in Proxmox virtualisation, some with dubious settings, but some even with proper passed through HBA. @Honeybadger discussed disabling the Proxmox scanning service here
before blacklisting the HBA, as per the link to Proxmox forum appeared to emerge as the preferred solution.
I could not find a more authoritative post here in a quick search.
It would certainly be useful if someone knowledgable could put out a validated Resource.
Simultaneous mounting by Proxmox and TrueNAS corrupts pools beyond repair.