Hi Michal,
I noticed the same change a while back. Service Studio makes a first guess and then sticks with it.
I guess it's a fine line for OS tool to choose how often and when to re-guess as names change. In earlier version of Service Studio I sometimes had explicitly chosen the type from the dropdown to what I want it to be, only to see it changed when I changed the name.
I think maybe there should be an option on each variable to either re-guess with every name change or not, so as a developer I can allow or block this behaviour as needed. So something like a flag on each variable called 'use name type accelerator', being true by default when adding a new variable. As soon as I am happy with the type, I uncheck the flag to make sure future name changes don't mess up the type.
Dorine
Btw, if you give the right name at the moment of creating the variable (so giving it the right name directly in the tree view, not later in the property pane), it works as you would expect.
I guess a lot would be solved if they waited until the developer tabs out of the Name property to do the type accelerator.