Jeff Skyrunner - Sorry for not replying early. Firstly, I fixed the local variables you had since they are not checked with "static" which will make it persist when you set it. Secondly, since your scroll + lerp is on a function so it will not work that's why I made a variable named "IsZooming" to make it zoom in every delta time. Remember lerps don't work with functions or triggers. Thirdly, I changed your UI from scale rate of 0 to 100 since I don't see any point of setting it to 0 for it is never set to change but I did change it's parallax from (100,100) to (0,0) since it is a UI and UI's work that way. BTW, I think you should resize your window size into something smaller and avoid box window sizes for wider range of compatibility with devices.
Also, remember to remove third party plugins/behaviors when you post in the forum but if it is necessary then please direct a link to it.
Fixed .Capx : https://1drv.ms/u/s!AjcW2ueud6qpoScBcR5abOTAWDl6