V0: Deploy changes has stopped working

Clicking deploy changes leads to “Deploying…” loader but then the deploy doesn’t actually happen

After a few seconds, I see “Last updated 48m ago” and it hasn’t updated

Reverting to a previously deployable state doesn’t help
Reverting to a previous fork that worked doesn’t help
It briefly worked for me and then has since stopped again – no idea why
Inspecting build logs doesn’t show any feedback – messages are all from previous build that worked