@louf Sorry for the late response, I am currently not maintaining Kodi packages since Kodi 19 does not support H265 HW video decoding on RPi 3/2, which are the ones that I still use for Kodi.
About your problem, I can't really tell, never happened to me and I never anyone complaining about something like that. Can you reproduce your problem and post a Kodi debug log? A photo/screenshot may also help.
Please do not post a support request without first reading and following the advice in https://retropie.org.uk/forum/topic/3/read-this-first