diff --git a/piker/tsp/_anal.py b/piker/tsp/_anal.py
index 46bee231..615dcb6b 100644
--- a/piker/tsp/_anal.py
+++ b/piker/tsp/_anal.py
@@ -276,15 +276,8 @@ def get_null_segs(
         absi_zdiff: np.ndarray = np.diff(absi_zeros)
 
         if zero_t.size < 2:
-            try:
-                breakpoint()
-            except RuntimeError:
-                # XXX, if greenback not active from
-                # piker store ldshm cmd..
-                log.exception(
-                    "Can't debug single-sample null!\n"
-                )
-
+            # Keep the legacy single-null result without a REPL stop.
+            # Full null grouping is handled downstream in 976db6c3.
             return None
 
         # scan for all frame-indices where the