(Hugs)
I'm getting better with Unexpected, but I still get long passwords wrong 1/3rd of the time :(
Its faster than multi-tap keyboards, though, I admit.
I have no idea how to get it to do Cyrillic, hopefully someone else can help.
Curious about the "no internet" error, wonder if your country of residence blocks Yandex IPs, or if Yandex is prone to block IPs from your country of residence. Maybe try adding Yandex keyboard to VPN/Tor and see if the problem changes...