Google Tag Manager Suddenly Stopped Loading the Chat Code

I noticed this morning that Google Tag Manger will no longer load the chat code correctly. When the code is hard coded into the page it works fine. But when I use GTM on my Joomla site with the chat code in that container the chat function is broken. Is anyone else seeing this suddenly? When I went in to repost the code into GTM Google said that I had to allow document.write. Never had to do this before. Perhaps it's something that Google changed.

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