Before Continuing:

• Check you are using the latest version of the mods and its dependencies
• Always include a latest.log if you are crashing
• Remove mod that enhances Minecraft: Optifine, Sodium, others. The issue persists.
• If you are unsure which mod is the culprit.
  Disable all of your mods and enable them 1-2 mods each time to isolate the culprit
• Confirm that there is no existing issue with a similar description submitted in the list of issues.

Version

1.20.1-FORGE

Supplementaries Version

supplementaries-1.20-3.1.7

Moonlight Lib Version

moonlight-1.20-2.13.26-forge

Issue Detail

I'm not able to insert or extract items from the sack without just placing it down and opening it with right-click. In previous Minecraft versions I was able to use it in-inventory like a small bundle with no issues. I've tried running a fresh installation with no other mods and while all other Supplementaries features seem to work fine the sack is still the same.
I really appreciated being able to open it without placing it down but understand if this was an intentional change. I have a lot of admiration for this mod and its cute and balanced features.

sack only has that feature as a quark integration thing

Ohhhh just tested it with Quark and now it's fine. Thank you, sorry about the inconvenience