My RII keyboard is too slow with the last stable version.
My Rii Mini WiFi i8+ keyboard is working perfectly, same as on all previous versions.
I have two remote and they dont work, each command is very very slow.
They work well in version 9.2.3.
Try to disable CEC - it´s broken in 9.2.4
Rollback to 9.2.3 and wait until 188.8.131.52 will be released.
How to configure a remote, You will find it searching the forum