No, not really but you can track the issue for yourself
https://github.com/gantry/gantry5/issues/2843
, DO NOT use G5.5 on a live site - there are many changes and there are still plenty of bugs outstanding too. I also would not start hacking G5.4 to apply the suggested fix either.
Linda Guild - as I said above the issue is caused by WP5.8 and Gantry 5 needs to be changed to work alongside this new version of WP that has substantial changes made - hence why I have raised a bug ticket on the Gantry 5 opensource project for them to fix - you can add your comments to that ticket. The issue is nothing to do with any RT products - it's purely Gantry 5 core.