I saw reports Belarus was pulling units back from Ukraine’s border. This could be why. Supposedly headed towards Brest, which could also mean trouble for the Poles.
Seems like it would make more sense to let the Russians replace losses with tanks, ifvs, and apcs from belarus.
https://en.wikipedia.org/wiki/List_of_equipment_of_the_Armed_Forces_of_Belarus
they protest in Belarus often....their last stolen election, there were massive protests, sadly nothing happened....