diff --git a/piker/ui/_dataviz.py b/piker/ui/_dataviz.py
index 1ad56bb4..1e798f68 100644
--- a/piker/ui/_dataviz.py
+++ b/piker/ui/_dataviz.py
@@ -1061,7 +1061,7 @@ class Viz(msgspec.Struct):  # , frozen=True):
 
             else:
                 log.warning(f'Unknown view state {vl} -> {vr}')
-                # return
+                return
                 # raise RuntimeError(f'Unknown view state {vl} -> {vr}')
 
         else: