From 037acf64db99bbd14dc56fadcb9daef61ba81b76 Mon Sep 17 00:00:00 2001
From: Jinwoo Hong <73622457+Jinwoo-H@users.noreply.github.com>
Date: Sun, 19 Apr 2026 15:07:49 -0400
Subject: [PATCH] fix(terminal): refresh WebGL canvas after resume to prevent
 frozen terminal (#837)

---
 src/renderer/src/lib/pane-manager/pane-manager.ts | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/src/renderer/src/lib/pane-manager/pane-manager.ts b/src/renderer/src/lib/pane-manager/pane-manager.ts
index 155b627cc26..8335e61d687 100644
--- a/src/renderer/src/lib/pane-manager/pane-manager.ts
+++ b/src/renderer/src/lib/pane-manager/pane-manager.ts
@@ -301,6 +301,18 @@ export class PaneManager {
     for (const pane of this.panes.values()) {
       if (pane.gpuRenderingEnabled && !pane.webglAddon) {
         attachWebgl(pane)
+        // Why: the fitPanes() optimization skips panes whose dimensions are
+        // unchanged (common when a worktree goes hidden→visible at the same
+        // window size). But the fresh WebGL canvas created by attachWebgl()
+        // has no painted content — without an explicit refresh the terminal
+        // appears frozen until something forces a dimension change (e.g. a
+        // split). This mirrors the onContextLoss handler in attachWebgl which
+        // calls the same refresh after falling back to the DOM renderer.
+        try {
+          pane.terminal.refresh(0, pane.terminal.rows - 1)
+        } catch {
+          /* ignore — pane may not be fully initialised yet */
+        }
       }
     }
   }