Indeed, thats how Mendix works.
Most of the times, post deployment, we will end up with ID being changed.
Where Mendix already advise us about this particular case and also provides an alternate to use CSS based finding of elements.
In my case, this is what I see. Although I am not sure, about the random string generated in the class.
Just in case, if this is not suitable, then you can also look at the options of finding the proper DOM element and click that. There are lot of ways to find a DOM element.