@SANCHIS thanks for all your feedbacks.
1- I can not connect to the wifi
=> it is not new on batocera unfortunatly. i've to work on that. not sure for 5.22.
2- the rice plugin in mupen64 shows black screen (sound is heard but not image)
noted to be confirmed.
3- do not let you configure the cores per game in the menu (there is no option)
yes. as written in the changelog, this option disappear temporarly.
I found another problem in mupen64plus (not libretro) in some games :
do you know if it worked in previous versions of the same emulator ? (in 5.21)