wtffff yes, this worked for me!
- Opened a new window
- Opened the same folder (not the workspace)
- Antigravity found my old connected workspace, asked if I wanted to open it instead
- Old workspace opened up, but chat history was now fixed
This is such a simple fix and should’ve been addressed in the changelog for the past 3 updates Google put out. Looks like it’s some cache/refresh issue.