I was watching UVB leading up to the war, it was pretty mundane, up to where people in the Estonia / Latvia / Lithuania / Belarus corridor started jamming the channel with music or drawing pictures on the SDR heatmaps.

Eg: https://www.youtube.com/watch?v=QWFg3i2dNK4

After that it devolved into a popularity contest over who had the strongest transmitter or was geographically closest to SDR recievers.

Then kiwisdr got ticked off and stopped letting people do time domain reflectometry to triangulate the signals.

My bets are on this new signal being a troll.