The December update made my custom key mappings in keyboard.xml no longer functional. My remote is a Vista MCE VRC-1100 and an example of a mapping that formerly worked is:
I’m using /home/osmc/.kodi/userdata/keymaps/keyboard.xml
I tested this on a fresh installation to be sure.
OSMC_TGT_rbp2_20181101 does not have this issue
The key mappings are still applied by testing on the USB keyboard.