Before filing
Closest existing issue
None found. I searched open and closed issues for artifact/preview/code viewer, close button/icon, invisible/hidden/disappearing, clipping, and background-chat auto-open behavior.
What's broken
After the Artifact Viewer appears automatically in a chat while that chat is in the background, returning to the chat can show the viewer without its top-right close X. The close button's hit target is still present and clickable, but the X icon is visually hidden behind or clipped by the viewer.
Steps to reproduce
- Launch Berd.
- Open a chat with prior history using
gpt-5.6-sol through the Goose harness.
- Start an agent turn that creates a document which causes the Artifact Viewer to auto-open.
- Navigate to another chat while that turn is running.
- After the Artifact Viewer has apparently auto-opened in the background chat, navigate back to that chat.
- Inspect the top-right corner of the Artifact Viewer.
This is intermittent; the sequence above describes the observed trigger rather than a guaranteed reproduction on every attempt.
What you expected to happen
The Artifact Viewer header should always display its close X in the top-right corner, including when the viewer auto-opened while its chat was in the background.
What actually happened
The X icon sometimes was not visible and appeared to be behind or clipped by the viewer. Clicking the location where the X should have been still closed the viewer, so the button remained interactive even though its icon was not painted visibly.
How often does it happen?
Intermittently — happens often but not always
Berd version
0.6.2
Operating system
macOS (Apple Silicon), macOS 26.5.2 (build 25F84)
Model and provider
gpt-5.6-sol through the Goose harness; underlying provider unknown. The symptom appears to be in the Artifact Viewer UI rather than model-specific behavior.
Relevant log output
Screenshots, recordings, or other context
No screenshot or recording was captured while the intermittent state was visible. The important distinguishing detail is that the close button remains clickable at its normal position; only the X icon disappears visually.
Before filing
Closest existing issue
None found. I searched open and closed issues for artifact/preview/code viewer, close button/icon, invisible/hidden/disappearing, clipping, and background-chat auto-open behavior.
What's broken
After the Artifact Viewer appears automatically in a chat while that chat is in the background, returning to the chat can show the viewer without its top-right close X. The close button's hit target is still present and clickable, but the X icon is visually hidden behind or clipped by the viewer.
Steps to reproduce
gpt-5.6-solthrough the Goose harness.This is intermittent; the sequence above describes the observed trigger rather than a guaranteed reproduction on every attempt.
What you expected to happen
The Artifact Viewer header should always display its close X in the top-right corner, including when the viewer auto-opened while its chat was in the background.
What actually happened
The X icon sometimes was not visible and appeared to be behind or clipped by the viewer. Clicking the location where the X should have been still closed the viewer, so the button remained interactive even though its icon was not painted visibly.
How often does it happen?
Intermittently — happens often but not always
Berd version
0.6.2
Operating system
macOS (Apple Silicon), macOS 26.5.2 (build 25F84)
Model and provider
gpt-5.6-solthrough the Goose harness; underlying provider unknown. The symptom appears to be in the Artifact Viewer UI rather than model-specific behavior.Relevant log output
Screenshots, recordings, or other context
No screenshot or recording was captured while the intermittent state was visible. The important distinguishing detail is that the close button remains clickable at its normal position; only the X icon disappears visually.