Timeout should be removed on destroy or disable (line 129 manager/rounded_corners_manager.js): https://gjs.guide/extensions/review-guidelines/review-guidelines.html#remove-main-loop-sources

Added timeout will been clear in line 105 of `manager/rounded_corners_manager.js` in `on_remove_effect()`, `on_remove_effect()` is called when destroy window actor: ```diff shadow.clear_effects () shadow.destroy () } + + // Remove all timeout handler + const timeout_id = actor.__rwc_rounded_window_info?.unminimized_timeout_id + if (timeout_id) GLib.source_remove (timeout_id) delete actor.__rwc_rounded_window_info } ```

Ok, but what's the reason for not using `info.unminimized_timeout_id` directly? Also in the timeout callback you should null out `info.unminimized_timeout_id` before returning `false`.