diff --git a/src/renderer/src/runtime/remote-runtime-terminal-multiplexer.ts b/src/renderer/src/runtime/remote-runtime-terminal-multiplexer.ts
index 8078bc77736..3b2761504bf 100644
--- a/src/renderer/src/runtime/remote-runtime-terminal-multiplexer.ts
+++ b/src/renderer/src/runtime/remote-runtime-terminal-multiplexer.ts
@@ -110,6 +110,7 @@ type RemoteRuntimeMultiplexedTerminalState = {
   // Track it so a gap triggers a self-healing snapshot resync instead of
   // silently rendering corrupt/missing output (frame-drop resync).
   expectedSeq: number | undefined
+  // Why: compare command probes when initial/live frames supplied no high-water.
   commandProbeBaselineSeq: number | undefined
   recoverySnapshotSeq: number | undefined
   resyncInFlight: boolean
@@ -1069,7 +1070,7 @@ class RemoteRuntimeTerminalMultiplexer {
             this.recoverStalledStream(stream)
             return
           }
-          stream.commandProbeBaselineSeq = snapshot.seq
+          stream.commandProbeBaselineSeq ??= snapshot.seq
         } else if (
           typeof snapshot?.seq === 'number' &&
           typeof stream.expectedSeq === 'number' &&
diff --git a/src/renderer/src/runtime/remote-runtime-terminal-stall-recovery.test.ts b/src/renderer/src/runtime/remote-runtime-terminal-stall-recovery.test.ts
index e12c0d7c280..8162b475df4 100644
--- a/src/renderer/src/runtime/remote-runtime-terminal-stall-recovery.test.ts
+++ b/src/renderer/src/runtime/remote-runtime-terminal-stall-recovery.test.ts
@@ -221,10 +221,30 @@ describe('remote terminal stalled stream recovery', () => {
     emitSnapshot(stream.streamId, samePayload?.requestId ?? 0, 'first-output', 12)
     await vi.advanceTimersByTimeAsync(0)
 
+    expect(onTransportClose).not.toHaveBeenCalled()
+    expect(stream.sendInput('regressed-snapshot\r')).toBe(true)
+    await vi.advanceTimersByTimeAsync(REMOTE_TERMINAL_COMMAND_RESPONSE_TIMEOUT_MS)
+    const regressedRequest = sentFrames(TerminalStreamOpcode.SnapshotRequest)[2]
+    const regressedPayload = regressedRequest
+      ? decodeTerminalStreamJson<{ requestId: number }>(regressedRequest.payload)
+      : null
+    emitSnapshot(stream.streamId, regressedPayload?.requestId ?? 0, 'partial-output', 8)
+    await vi.advanceTimersByTimeAsync(0)
+
+    expect(onTransportClose).not.toHaveBeenCalled()
+    expect(stream.sendInput('still-below-baseline\r')).toBe(true)
+    await vi.advanceTimersByTimeAsync(REMOTE_TERMINAL_COMMAND_RESPONSE_TIMEOUT_MS)
+    const belowBaselineRequest = sentFrames(TerminalStreamOpcode.SnapshotRequest)[3]
+    const belowBaselinePayload = belowBaselineRequest
+      ? decodeTerminalStreamJson<{ requestId: number }>(belowBaselineRequest.payload)
+      : null
+    emitSnapshot(stream.streamId, belowBaselinePayload?.requestId ?? 0, 'partial-output', 10)
+    await vi.advanceTimersByTimeAsync(0)
+
     expect(onTransportClose).not.toHaveBeenCalled()
     expect(stream.sendInput('echo second-output\r')).toBe(true)
     await vi.advanceTimersByTimeAsync(REMOTE_TERMINAL_COMMAND_RESPONSE_TIMEOUT_MS)
-    const advancedRequest = sentFrames(TerminalStreamOpcode.SnapshotRequest)[2]
+    const advancedRequest = sentFrames(TerminalStreamOpcode.SnapshotRequest)[4]
     const advancedPayload = advancedRequest
       ? decodeTerminalStreamJson<{ requestId: number }>(advancedRequest.payload)
       : null