1 files changed, 2 insertions, 1 deletions
diff --git a/src/detached/server.zig b/src/detached/server.zig
index 202eafb3..5bf2384b 100644
--- a/src/detached/server.zig
+++ b/src/detached/server.zig
@@ -523,7 +523,8 @@ pub const Session = struct {
         const s = of(ctx);
         if (pane >= s.ptys.len) return;
         const pt = s.ptys[pane];
-        if (pt.fd < 0) return;
+        // A command whose exit is recorded is reaped: its group may be another's.
+        if (pt.fd < 0 or pt.cmd.exited) return;
         host_io.signalTty(pt.pid, pt.fd, sig);
     }