Stack Resizer Mod Not Combining Stacks Properly

When in my inventory or container I try to combine stacks to the value I have set. When I drag stack onto others in order to combine them, they do not combine but instead disappear, causing me to lose items. Bug?

Solution

I did not remove any mods. All I did was downgrade back to 1.3.0 and the problem went away. We can mark my problem solved. Peace out!