Hello, After the update stacks are not working in my server any longer. I have updated all plugins. When I view/edit the StackSizeController.json 
data file it shows stack  sizes as I want them, but in game they are default. I can use chat commands to change the stack sizes back, but once server reboots the stacks revert back to default. Any help at all would be greatly appreciated!!!

same issue here, did you find a soultion?

No, I haven't. For now I log in to my server and type in each item  individually . I've only been rebooting every 12 hours now to keep from having to do it too often, It doesn't allow everything to stack that way, but I at least I have resources ammo and food stacked better than default this way. I have even went and removed the plugin deleted all files and started from scratch  still the same outcome.

ok i found the soultion, i deleted everything and redownloaded the mod. I knoticed under the data section my first item listed wasnt the wolf mask. I am thinking the data file i had didnt contain the new musical items and that may have been the issue. I had to readjust the stacksizes but all is well and good. Thankyou for your support and amazing mod!

Yes, deleting and reinstalling after todays update resolved this issue