Since latest WideVine update to version libwidevinecdm.so.4.10.1440.18 some users have problems with frame skipping on high bit-rate scenes. I found out that using previous WideVine version libwidevinecdm.so.4.10.1303.0 solves this problem.
For anyone interested I uploaded both, new and old WV versions here.
Zip is pass protected with easily guessed password
Scenes to test the difference: “Our Planet” E1 4min-6min and “Kiss Me First” E1 from beginning. On both scenes the bitrate goes over 20 Mbit/s.