Premoves don't work for ICCF and UCI keyboard input (Bug)

I tried to enter premoves using keybord. This works when using SAN notation but not when using ICCF or UCI. I can input coordinates while it is the opponent's turn, but when it becomes my turn, the input just vanishes and no premove is being executed.

Can somebody confirm this issue? Maybe it's a browser problem, I'm not sure.