there were no other options with the clients
They couldn't downgrade the clients? Sounds like that was the easiest option. You can also temporarily use something Keyguard, or why not, permanently given the latest news from Bitwarden.
yes. it was that. look up the vaultwarden issues, they were very popular.
Since providing sources was too hard, apparently. I think you're referring to this issue from August for example? Issue was reported on August 20th and was fixed by September 7th. Kinda sounds like you wouldn't have problems if you restricted updates for your users. Delay updates by a few weeks (or why not, a month) unless they're absolutely necessary and you're golden.
Like I said, there are options. Maybe instead of blaming Vaultwarden, you could learn from your own mistakes.