This is my debug log kodi.log. I'm running CoreELEC as my device is S905X. Apologies if it's not appropriate for this forum, but since others had reported the same issue and no one has posted a log I thought I should post it. For my test I pressed the down arrow key twice (KEY_DOWN, one of the keys which kodi handles whether or not eventlircd is active) and then KEY_BLUE and KEY_YELLOW which I have mapped to VolumeDown and VolumeUp. Compare to this kodi.log, where I repeated the same test after restarting eventlircd.
When this problem occurs, irw doesn't respond to any button presses even though eventlircd seems to be running in the background. Also, it doesn't happen on every boot, but most of the time it does. My suspicion is there is a race between kodi and eventlircd. If kodi starts before eventlircd, then eventlircd isn't able to capture the inputs.