GUI with scroll bars

[Smile_]

Hi everyone!
I have found this class which does add a scroll bars to a gui, which is running perfect when I first tested it.
But the issue appeared when I tried to apply the same on another GUI in same script which seems to have some conflicts between each other, it is like when I scroll the first GUI the second is also gets scrolled, sometimes the controls disappear.

I do a call to the ScrollBar class each time I want to apply it, maybe the class instance is not created correctly.
Any easy way to fix it?

[WarlordAkamu67]

There are a few posts about GUI scrolls bars, but I don't know about multiple GUIs. I have used the functions from this post with a GUI.