She might have the first version of Sync 2 (also known as MyFord Touch). Very buggy, from what I've read.Not sure if this problem was corrected on fords, but my Aunt has a Ford Flex(don't know the year) and she doesn't care much for the touch screen controls on it.
The updated version of Sync 2, which can be downloaded to a USB flash drive and then installed, works well although it is does not offer many features. No Apple CarPlay, no Android Auto, no in-dash app widgets.
Sync 3 - from version 3.1 to 3.3 - is buggy as hell when toggling between audio sources when one of the sources involves WiFi. RDS when listening to FM radio also malfunctions a lot on 3.3. Version 3.4 fixed most if not all of those issues. Usually, Ford vehicles from model year 2016 and up have Sync 3.
As far as the Nissan Rogue is concerned, proper maintenance is crucially importance. Jatco CVTs (continuously variable transmissions) are known for becoming problematic once cars start to show some age.