They can supposedly unearth 20 meters down into the ground. They're hell on troops. There's no indication they're coming unless you're privy to radar data of the bombers flying around. They just ... show up. Can you imagine? Talk about being caught off guard. Apparently insanely loud also, if you manage to survive close proximity your ear drums are probably blown out. Traumatizing as fuck according to the soldiers who manage to get word out. Who would have thought artillery would be preferential to contend with.
It gets better:
Yesterday's ISW report mentions, "The Russian Air Force (VKS) reportedly started using guided glide bombs against Ukraine. Russian milbloggers claimed that Russian forces recently started conducting air strikes with guided glide bombs with universal interspecific glide ammunition (UMPB), as opposed to using unguided glide bombs with unified planning and correction modules (UMPK), in unspecified areas in Ukraine.[
51] Russian milbloggers claimed that the guided glide bombs with UMPB have jet engines, which are absent from FAB-250/500 bombs with UMPC, and thus can increase the range of a FAB-250/500 from 40-60 kilometers to
80-95 kilometers.[
52]"
edit: ^ Apparently they're tired of losing bombers as frequently as they have been. Forgot to mention that -- that's my assessment.