Cannot reload a recorded simulation from a paused recorded simulation

[rhoslynroebuck]

Replicating the bug:

1. Load a recorded simulation
2. Pause it
3. Reload the same recorded simulation

The playback is incorrect:

You can workaround this by playing the simulation before loading the next one.

1. Load a recorded simulation
2. Pause it
3. Press play
4. Reload the same recorded simulation (works fine)

[Ragzouken]

code where simulation loading happens: https://github.com/IRL2/nanover-rs/blob/main/nanover-rs/src/simulation_thread.rs#L56-L80

code for playback from recording: https://github.com/IRL2/nanover-rs/blob/main/nanover-rs/src/recording.rs

I would guess something to do with loading the same file simultaneously, but that wouldn't explain why there's a difference when playing vs paused