need to strip sounds when FrontSide rendering deferred

pylib/anki/template.py

@@ -35,6 +35,7 @@ import anki
 from anki import hooks
 from anki.hooks import runFilter
 from anki.rsbackend import TemplateReplacementList
+from anki.sound import stripSounds
 
 
 def render_card(
@@ -70,7 +71,7 @@ def apply_custom_filters(
         else:
             # do we need to inject in FrontSide?
             if node.field_name == "FrontSide" and front_side is not None:
-                node.current_text = front_side
+                node.current_text = stripSounds(front_side)
 
             field_text = node.current_text
             for filter_name in node.filters: