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fix(dekstop): when streaming markdown with code blocks, scroll jumped erratically. #10372
Description
Description
when streaming markdown with code blocks, scroll jumped erratically.
found the cause: setupCodeCopy() ran on every render, wrapping <pre> blocks with <div data-component="markdown-code"> + copy buttons. these wrappers weren't in the HTML
output, so on next render the DOM was completely replaced via innerHTML, destroying wrappers, then setupCodeCopy re-added them. This cycle caused layout thrashing → scroll jumping.
Issue Video:
https://jumpshare.com/s/zb0Mn1orq7Wgw5NTaJcQ
Plugins
No response
OpenCode version
1.1.34
Steps to reproduce
No response
Screenshot and/or share link
Operating System
macOS Tahoe 26.2
Terminal
No response
Reacted by Bohdan Shulha
Activity
github-actions commentedon Jan 24, 2026
While there are related scroll/rendering issues in the repository (#9886 for disruptive auto-scroll behavior, #6172 for high CPU during streaming), this issue appears to have a distinct root cause related to the
setupCodeCopy()function being called on every render and causing DOM replacement via innerHTML. The related issues have different underlying causes and solutions, so this is likely not a duplicate. However, it's worth noting these exist as they may interact with each other's fixes.