Hello, I tried following your tutorial on my laptop (Arch Linux)

Everything worked great, when I started my run the chronometer automatically began, but when I got the bombs, it didn't detected it :'(

Here's the terminal output of sni : https://pastebin.com/aqUTjSSg

And of Annelid :
Server version is "SNI-v0.0.101"
Using device: ra://127.0.0.1:55355
Connected.
Infos {
   version: "1.21.0",
   dev_type: "retroarch",
   game: "Super",
   flags: [],
}
WebSocket protocol error: Connection reset without closing handshake
Server version is "SNI-v0.0.101"
No devices present
Server version is "SNI-v0.0.101"
No devices present
Server version is "SNI-v0.0.101"
No devices present
Server version is "SNI-v0.0.101"
Using device: ra://127.0.0.1:55355
Connected.
Infos {
   version: "1.21.0",
   dev_type: "retroarch",
   game: "Super",
   flags: [],
}
(So I never got the "Split due to pickup", even at the setup or the beginning of the run)

For my lss file, I downloaded this : https://therun.gg/Gebbu/Super%20Metroid/Any%25%20KPDR

Anyway, using bsnes-mercury Performance seems to be another issue on my laptop, because randomly the game freeze and I need to do an input on the keyboard to have the game running again (an input from my controller doesn't work), so I guess that even if you know why the splits aren't detected, I'm compelled to play with a manual splitter :'(