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Markdown preview loses scroll position after switching tabs #22300
Description
When I switch away from a rendered markdown file in the file preview panel and come back, the preview jumps to the top. It should come back where I left it, the way the code view does when it restores its view state.
Steps:
- Open a long .md file in the right-hand file preview panel, rendered view.
- Scroll down.
- Switch to another tab, then back to the file.
Expected: the preview is where I left it.
Actual: the preview is back at the top, so on a long document I have to find my place again after every tab switch.
There is no setting for this. Remembering the position per file would be enough.
Version: T3 Code Nightly 0.1.1-nightly.20261019.3360, macOS.
Reacted by santiagopuentep, Ian Selley and Daniel Harvey
Activity
juliusmarminge commentedon Oct 22, 2026
Reproduced in the web dev app on Linux at ed9b7ca9c5: opened AGENTS.md in the right-hand file panel, enabled rendered Markdown, scrolled 1,800 px, switched to README.md, then returned to AGENTS.md. The preview returned to 0 px. Recording. Native macOS/Electron has not been checked.
juliusmarminge commentedon Oct 22, 2026
Reproduced in the web development app on 96bae5465b: scroll rendered Markdown to 1,800 px, switch file tabs, then return; the preview resets to 0. The fix restores 1,800 px. The real-layout browser regression fails before and passes after; 14 focused tests pass.
Fix: #23503.
Before recording · After recording · Evidence and verification gaps.
Native Electron could not be checked on this Linux VM; the shared web panel was verified at wide and narrow widths in light and dark themes.
alcosml commentedon Nov 6, 2026
Also reproduces on Windows 11 (desktop app, T3 Code Nightly
0.1.8-nightly.20261106.4247), and the trigger isn't limited to switching between file tabs:.mdfile in the right panel (rendered) next to a side chat tab..mdtab and copy some text..mdtab.The preview is back at the top. The right panel renders only the active surface (
ChatView.tsxpasses the active surface toRightPanelSurfaceContent), so any tab switch unmounts the preview. Any fix should cover switches to non-file tabs (side chat, terminal, etc.) as well.This makes a common workflow tedious: read a plan, copy a passage, quote it in a side chat, go back for the next passage, and find your place again every time.
Reported through
t3 triage; comment drafted by Claude Opus 5.5 (claude-opus-5-5) in Claude Code.