Same here. I would like to use my Flirc 2.0 [dori] with a Zotac remote, but it only reacts to every second keypress.
# evtest --grab /dev/input/event3
[First press]
Event: time 1613386729.571849, type 4 (EV_MSC), code 4 (MSC_SCAN), value 70027
Event: time 1613386729.571849, type 1 (EV_KEY), code 11 (KEY_0), value 1
Event: time 1613386729.571849, -------------- SYN_REPORT ------------
Event: time 1613386729.700038, type 4 (EV_MSC), code 4 (MSC_SCAN), value 70027
Event: time 1613386729.700038, type 1 (EV_KEY), code 11 (KEY_0), value 0
Event: time 1613386729.700038, -------------- SYN_REPORT ------------
[Second press -- Nothing]
Frank