Blizzard party/raid frames appear when a member joins during combat

[Roburmaster]

Priority
Medium

Description
When a player joins the group while in combat, the default Blizzard party or raid frames temporarily appear. These frames disappear again once combat ends.

This likely happens because the addon cannot safely hide or modify the Blizzard frames while in combat due to WoW's combat lockdown restrictions. As a result, the default frames become visible until combat ends.