diff --git a/jdaviz/core/template_mixin.py b/jdaviz/core/template_mixin.py
index 24fb3b49c3..506bc78298 100644
--- a/jdaviz/core/template_mixin.py
+++ b/jdaviz/core/template_mixin.py
@@ -4562,7 +4562,10 @@ def _on_glue_value_changed(self, value, update_mixed_state=True):
     def unmix_state(self, new_value=None):
         if new_value is None:
             new_value = self.value
-        self._on_value_changed({'new': new_value})
+        if new_value != self.value:
+            self.value = new_value
+        else:
+            self._on_value_changed({'new': new_value})
         self.sync = {**self.sync,
                      'mixed': False}