Have you tried playing with the ir-keytable --delay and --period settings?
I use ir-keytable --delay 440 --period 60
Test which works best for you, then put the command in an autostart.sh and copy to /storage/.config
Got it! Thanks for your help. I had to put /dev/event/... in order to make it work. with --delay 800 it does the job!
Marc