To Recreate: Fresh install, start Lynx Game (from IARL). Core boots to black screen and no error message is present.
20:39:43.862 T:140735305183232 INFO: GAME: ------------------------------------
20:39:43.862 T:140735305183232 INFO: GAME: Loaded DLL for game.libretro.beetle-lynx
20:39:43.862 T:140735305183232 INFO: GAME: Client: Atari - Lynx (Beetle Handy) at version 0.9.32
20:39:43.862 T:140735305183232 INFO: GAME: Valid extensions: .lnx
20:39:43.862 T:140735305183232 INFO: GAME: Supports VFS: no
20:39:43.863 T:140735305183232 INFO: GAME: Supports standalone execution: no
20:39:43.863 T:140735305183232 INFO: GAME: ------------------------------------
20:39:43.863 T:140735305183232 DEBUG: PERIPHERALS: Event poll handle registered
20:39:43.863 T:140735305183232 INFO: RetroPlayer: Opening: /Users/xxx/Library/Application Support/Kodi/userdata/addon_data/plugin.program.iarl/temp_iarl/Battle Wheels (USA, Europe).lnx
20:39:43.863 T:140735305183232 DEBUG: GameClient: Loading /Users/xxx/Library/Application Support/Kodi/userdata/addon_data/plugin.program.iarl/temp_iarl/Battle Wheels (USA, Europe).lnx
20:39:43.863 T:140735305183232 INFO: AddOnLog: Atari - Lynx (Beetle Handy): Loading /Users/xxx/Library/Application Support/Kodi/userdata/addon_data/plugin.program.iarl/temp_iarl/Battle Wheels (USA, Europe).lnx...
20:39:43.863 T:140735305183232 INFO: AddOnLog: Atari - Lynx (Beetle Handy): Using module: lynx
20:39:43.864 T:140735305183232 INFO: AddOnLog: Atari - Lynx (Beetle Handy): MDFN_MakeFName: /Users/xxx/Library/Application Support/Kodi/userdata/addon_data/game.libretro.beetle-lynx/resources/system/lynxboot.img
20:39:43.865 T:140735305183232 INFO: AddOnLog: Atari - Lynx (Beetle Handy): ROM: 128KiB
20:39:43.866 T:140735305183232 INFO: AddOnLog: Atari - Lynx (Beetle Handy): ROM CRC32: 0xbd99dc1b
20:39:43.866 T:140735305183232 INFO: AddOnLog: Atari - Lynx (Beetle Handy): (null)
20:39:43.866 T:140735305183232 INFO: GAME: ---------------------------------------
20:39:43.866 T:140735305183232 INFO: GAME: Base Width: 160
20:39:43.866 T:140735305183232 INFO: GAME: Base Height: 102
20:39:43.866 T:140735305183232 INFO: GAME: Max Width: 160
20:39:43.866 T:140735305183232 INFO: GAME: Max Height: 102
20:39:43.866 T:140735305183232 INFO: GAME: Aspect Ratio: 1.568627
20:39:43.866 T:140735305183232 INFO: GAME: FPS: 75.000000
20:39:43.866 T:140735305183232 INFO: GAME: Sample Rate: 44100.000000
20:39:43.866 T:140735305183232 INFO: GAME: Region: NTSC
20:39:43.866 T:140735305183232 INFO: GAME: ---------------------------------------
20:39:43.866 T:140735305183232 DEBUG: GAME: Audio sample rate is supported, no scaling or resampling needed
20:39:43.867 T:140735305183232 DEBUG: GAME: No in-game saves (save ram) to load
20:39:43.867 T:140735305183232 DEBUG: GAME: No in-game saves (rtc) to load
20:39:43.868 T:140735305183232 DEBUG: RetroPlayer: Using game client game.libretro.beetle-lynx
20:39:43.868 T:123145305063424 DEBUG: Thread GameLoop start, auto delete: false
Restart game. Same issue: Black Screen
Restart Kodi. Game started as expected.