Alt+Enter behaviour - Alt shortcuts remain active
Extremely annoying indeed (I'm being gentle). It makes it very hard to write DAX measures with many variables. And if you're unlucky and accidentally press escape to get rid of the ALT shortcodes in the PBI Desktop menu, like I just did, you end up loosing your full DAX formula, which, in case of lengthy and more complex formulas is extremely frustrating.
The behaviour is that when releasing the ALT button (after having pressed this together with the return button to enter a new whiteline), it will also engage the menu item shortcuts, which means that the next character you type, doesn't type in the formulabar anymore, but instead interacts with the menu. So basically it throws you out of the formula bar all the time when writing DAX code.
This is just as frustrating as the Intellisense functionality deleting functions when adding something in front of an existing function, or changing simple keywords like "in" or "then" to completely irrelevant functions in M query, which is also very annoying.
It would be very nice (I'd say essential) to have this fixed.