I am literally dressed and ready to head out for a 3000' training ride with tight twisty descents and IMHO it is quite suicidal to look down at a map when anything like you describe might happen. If I was a riding with you and I noticed you doing what you claim you need to do I would stop, let you go on, and if I didn't hear any crunching noises, resume, never to ride with you again.
Apex "civilization": people trust a fucking tiny map off in some other direction than they are traveling in lieu of the data streaming realtime right into their goddam eyes.
So you're looking at that fucking map, and what do you do when the squirrel/deer/javalina/pile of lumber discard appears in front of you?
I should delete this but no I am going to descend Thumb Butte road in a fury now.