This is a pretty common bug whose effects are:
- Achievements reset every time you close a world. When you re-enter a world you will get the Inventory Management Achievements(AKA Pressing E).
The only solutions I found where from years ago, one referencing a technicpack forum thread that doesn't exist anymore, and the other a now-dead MediaFire link.
Most of the responses to people asking this question where boiler-plate responses like:"Did you install mods?", "Did you mess with the jar?", "Did you update?".
Any solutions?