copy_to_clipboard fails with "Error using the system clipboard" on macOS Sequoia 15.7.1

[pathfinderscrown]

Copying text to the system clipboard fails on macOS Sequoia. When selecting text and pressing Cmd+C, a footer-text appears showing "Text copied to system clipboard" followed immediately by "Error using the system clipboard."

Environment:

Ghostty version: 1.2.3 (stable)
macOS version: 15.7.1 (Build 24G231)
Installation method: Homebrew (brew install --cask ghostty)

Steps to reproduce:

Open Ghostty
Select any text
Press Cmd+C (or use Edit → Copy)

Expected behavior:

Text is copied to the system clipboard and can be pasted in other applications.

Actual behavior:

Toast shows "Text copied to system clipboard" then "Error using the system clipboard." The text is not available in the system clipboard. pbpaste returns previous clipboard contents.

Relevant config:

clipboard-read = allow
clipboard-write = allow
copy-on-select = clipboard

Log output:

log stream --predicate 'process == "ghostty"' 2>&1 | grep -i "error|clipboard|paste"
ghostty: (AppKit) [com.apple.AppKit:Pasteboard] NSPasteboard (name: com.mitchellh.ghostty.selection): data requested for type public.utf8-plain-text at index 0
ghostty: [com.mitchellh.ghostty:AppDelegate] action failed action=copy_to_clipboard

Notes:

pbcopy / pbpaste work correctly in Ghostty (system clipboard is functional)
Other Cmd shortcuts (Cmd+V, Cmd+N, Cmd+Q) work normally
Fresh install after complete removal of all Ghostty files
Removed quarantine attribute with xattr -d com.apple.quarantine /Applications/Ghostty.app
Tried tccutil reset All com.mitchellh.ghostty — no effect

Any idea how to solve this problem?