LG Magic Remote AN-MR19BA long-press

[toii]

Can anyone confirm if LG Magic Remote is capable of sending a long-press from a programmable button?  I have my remote set to emulate a DVD player.  I have programmed various buttons with different keycode mappings for short and long press of the same button but a long press is being interpreted just as if it was a short press. 

I know the remote can differentiate between a long and short press of the non-programmable buttons (eg the Settings button).  But these buttons are not using IR frequency whereas the programmable buttons are using IR frequency.

The model is AN-MR19BA which is the 2019 model Magic Remote.

https://www.lg.com/us/tv-audio-video-accessories/lg-AN-MR19BA-magic-remote-control