Since a week or so I suddenly get `INVALID_SESSION_ID: Session expired or invalid` errors when trying to deploy to a sandbox. Around the same time, I suddenly started seeing the line `*** Deploying with REST ***` when running an `sfdx force:source:deploy`.

I never used to see my token expire before. Now I have to daily go and re-auth my org connection.

This seems like a regression. What's going on?