Hello,
Everytime i switch mode on any tool it does not apply it. On the screenschot it says it is disabled but i am flying, same when i am charging my tools up. To really change the mode i need to switch mode drop it pick it up and then it is changed it is since i installed MekanismGenerators
VERSION: Mekanism: 10.0.21.448, MekanismGenerators: 10.0.21.448

You have not followed the form. What version do you use?

Mekanism: 10.0.21.448, MekanismGenerators: 10.0.21.448 it is since i installed MekanismGenerators

Hmm not quite sure what is going on given it seems like a sync bug where the server isn't syncing items in your inventory when they change for some reason.

I'll try it in a single player world later. To look if the bug is also there

Does this happen in single player? And if not is it a normal forge server or are they using some weird hybrid server software.

It is a normal forge server. I haven't tried it in single player so far

but today i found out sometimes when i join the server it works like it should be but after re-equiping it doesn't work anymore. + same with meka tools and meka armor

I tried it out now and it seems like it is no sync bug, because it doesn't work in singleplayer worlds either

Sure, when I said with just Mekanism I meant Mekanism and any of our official addons you wish to include in the test be it none or all.

In the new Instance it works fine how it should

It works fine even with all the mods added just on the other Profile it doesn't work

Could you try on a fresh instance with just mekanism installed (and just spawn various stuff in via creative for testing). Given single player still has two sides an integrated server and the client so there is still a slight chance that if it is a mod screwing it up and isn't something on Mek's end that it would be breaking syncing in single player as well.

Ok, but with Mekanism Generators? because it is since i installed that

I am going to go ahead and close this then as I can't reproduce it either and assume that it probably was some other mod that maybe had its configuration get screwed up or something and was causing the things to not sync properly from server to client side.