stacking does not always work for me

I bought the plugin today and tried stacking things however sometimes i just cant get anything to stack at all. I tried using left click, right click, and middle click. Sometimes things would stack other times not. what am i doing wrong? i have included my config and a video of the plugin just not stacking water catchers

StackEverything.json

hello
to stack items you have to use the right mouse button.
In the ground you have to try to put the items flat or you may receive errors from rust.
Also if sometimes you see that it doesn't work, change item and then select the item you want to stack again.
I'm attaching an example video
 

everything is working after a server reboot, for some reason unloading and reloading the plugin did not work. Thank you and sorry for the trouble

no problem, the important thing is that everything works now

Changed Status from Pending to Not a Bug