Bubbles in dungeons

[Platine]

Hello, I normally use the following code to define a bubble object:

function BB_findChatBubble(msg)
   for _, bubble in pairs(C_ChatBubbles.GetAllChatBubbles()) do
      -- Iterate the children, as the actual bubble content 
      for i = 1, bubble:GetNumChildren() do
         local child = select(i, select(i, bubble:GetChildren()))
         if ((child:GetObjectType() == "Frame") and (child.String) and (child.Center)) then
            -- This is hopefully the frame with the content
            for i = 1, child:GetNumRegions() do
               local region = select(i, child:GetRegions());
               if region and not region:GetName() and region:IsVisible() and region.GetText and (region:GetText() == msg) then
                  return region;      -- this is serching object
               end
            end
         end
      end
   end
end

But this code doesn't work in dungeons. Bubbles in dungeons do not spawn from variable C_ChatBubbles.GetAllChatBubbles().
Is there another way to determine the currently displayed bubble in a dungeon?