Strange.
There is no H FM antenna on Rivne's mast, but there are several mixed polarizations. (Unfortunately, we don't have enough photos of Kovel's mast to tell the same).
H FM polarization in Ukraine is rare, mostly it's on TV antennas used for analog in FM band.
88.5 & 89.5 are V in ITU and 4&5 TVK were not used in Rivne