diff --git a/enterprise/app/controllers/api/v1/accounts/contacts/calls_controller.rb b/enterprise/app/controllers/api/v1/accounts/contacts/calls_controller.rb
index 64c41993b..740a2fda4 100644
--- a/enterprise/app/controllers/api/v1/accounts/contacts/calls_controller.rb
+++ b/enterprise/app/controllers/api/v1/accounts/contacts/calls_controller.rb
@@ -42,12 +42,16 @@ class Api::V1::Accounts::Contacts::CallsController < Api::V1::Accounts::BaseCont
 
   # Reuse the open conversation when the caller is already inside it; ignore
   # the hint if it doesn't belong to the picked voice inbox or dialed contact.
+  # Only reuse open conversations — Message#reopen_conversation skips outgoing
+  # messages, so dropping a voice_call bubble into a resolved/snoozed/pending
+  # thread leaves it stuck in that state.
   def existing_conversation
     return nil if params[:conversation_id].blank?
 
     conversation = Current.account.conversations.find_by(display_id: params[:conversation_id])
     return nil unless conversation
     return nil unless conversation.inbox_id == voice_inbox.id && conversation.contact_id == contact.id
+    return nil unless conversation.open?
 
     conversation
   end