Is Russia using a new IFF symbol in Ukraine?

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I found three pictures of destroyed vehicles that have "Circle with a Slash" markings that I haven't seen before. It seems like these pictures can be traced back to the March 29th in the Chernihiv Oblast, which is no longer under Russian Federation control.

If anyone finds pictures of vehicles with "Circle with a Slash" markings, please send them to me. I want to try to geolocate this unit and figure out who they are.