Widget stops working once zoom in/zoom out

I’m using the plugin to make a sticky table of contents and it seems when I zoom in or out the column stops “existing” as in it no longer takes up any of the width and the right column will overlap with it.

Also, on another note, there is an issue where it does not go all the way down to the stopping point as the height it a lot longer than the height of the table of contents.
I am using the improved version but have tried both and same results.
I am using a third party build called bold builder.

Any help on this would be greatly appreciated! ??