Every time i try to sort my inventory with mouse3 or R, it tries to sort it but everything reverts after 0.5s and some items disappear, once i close my inventory i drop those disappeared items. Below are some pictures of what happens

Look from bottom.

This is how it looks after closing inventory, after i press R

1s after pressing R

A moment after pressing R

Before pressing R

See #155, etc. Issues with servers cannot be resolved in the client-side mod portion.