Thank you, i made also a video of the problem
Link: Download VID 20210102 014817 mp4
Example: system menu > using right key
Milhouse build : OK
Code
LibreELEC (Milhouse): devel-20200718000045-#0717-g776b589 (Generic.x86_64)
LibreELEC:~ # ir-keytable -t -s rc0
Testing events. Please, press CTRL-C to abort.
80.438046: lirc protocol(rc6_mce): scancode = 0x800f0421
81.659668: lirc protocol(rc6_mce): scancode = 0x800f0421 toggle=1
81.802907: lirc protocol(rc6_mce): scancode = 0x800f0421 toggle=1
82.350893: lirc protocol(rc6_mce): scancode = 0x800f0421
82.494275: lirc protocol(rc6_mce): scancode = 0x800f0421
82.989932: lirc protocol(rc6_mce): scancode = 0x800f0421 toggle=1
83.133181: lirc protocol(rc6_mce): scancode = 0x800f0421 toggle=1
83.680489: lirc protocol(rc6_mce): scancode = 0x800f0421
83.824333: lirc protocol(rc6_mce): scancode = 0x800f0421
84.242288: lirc protocol(rc6_mce): scancode = 0x800f0421 toggle=1
84.833790: lirc protocol(rc6_mce): scancode = 0x800f0421
85.495601: lirc protocol(rc6_mce): scancode = 0x800f0421 toggle=1
Display More
9.80 buld of 30 dec with problem
Code
LibreELEC:~ # ir-keytable -t -s rc0
Testing events. Please, press CTRL-C to abort.
51.863317: lirc protocol(rc6_mce): scancode = 0x800f0421 toggle=1
52.663831: lirc protocol(rc6_mce): scancode = 0x800f0421
52.806968: lirc protocol(rc6_mce): scancode = 0x800f0421
53.858506: lirc protocol(rc6_mce): scancode = 0x800f0421 toggle=1
55.456566: lirc protocol(rc6_mce): scancode = 0x800f0421
55.599770: lirc protocol(rc6_mce): scancode = 0x800f0421
56.367927: lirc protocol(rc6_mce): scancode = 0x800f0421 toggle=1
56.511413: lirc protocol(rc6_mce): scancode = 0x800f0421 toggle=1