Yep, those are the settings which can cause trouble with some apps.
I've never changed those setting for a long time. On one occassion i had one of those settings set to large and noticed that an app had troubles with the larger setting. I was a test for me just to see what happen when you change these settings.
Maybe MRA can do something this. I can understand you want some larger text but a map should be affected by these kind of settings. There is the typical zoom function of the map for.