[Bug]: Sophisticated backpacks data increase data size with no reason

[wangeliot]

Possible Fixes

Yes

Modpack Version

2.21

What happened?

I play this in single world.
I lost every thing in my backpack , so I try to check my backup data.
[world]/data/sophisticatedbackpacks.dat this file seems keeps everything in backpack, but it's file size is about 40m.
I try to restore this file , but this file size keep going larger, and my backpack data kept corrupt again.
1.I check no backpack gathering resource .
2.I delete sophisticatedbackpacks.dat, so my backpacks all empty.
3.I void all backpacks.
but nothing change, this data file increase size with no reason.

latest.log

No response

Developer reports

No response