Mod Name

Immersive Aircraft and Flashback

Mod Homepage

https://github.com/Luke100000/ImmersiveAircraft

Minecraft version

1.21.1

Describe the bug

When starting any world with Immersive Aircraft for NeoForge installed, players in Flashback fails to spawn

Steps to reproduce

1. Install NeoForge 1.21.1, Sinytra Connector, and Immersive Aircraft for Neoforge
2. Join any world, and record a Flashback
3. View the Flashback and it will give an error saying Player cannot be spawned

Logs

https://gist.github.com/kaedenreese/5a47466cf132b35da7642a615568a5bc

Additional context

I spoke with Immersive Aircraft, and their solution was to just use the Fabric version of the mod via Sinytra, which works fine with Flashback after testing. But we are running a multiplayer server with multiple aircraft already in the world, the world is months old, and I've tested that the Fabric version of the mod is not compatible with the NeoForge version of the mod. Aside from the logistics of getting all the players to modify their modpacks. It is impossible to extract Immersive Aircraft NeoForge from the world to swap to the Fabric version.

The mod author also says that the indicated payload creating the error: immersive_aircraft:vehicle_upgrades

"Shouldn't do that"

Which I admit isn't helpful, but that's all I've got. I'm a small YouTube creator, and losing these Flashbacks would be inconvenient, but not devastating. So I'm just doing what I can to try to fix it. My next stop after this one is Flashback itself if this is not a Sinytra issue, but I'm trying all options. Thank you in advance.