Disable option for extra screen on approaching a turn.

I do not have Edge 1050 (it might be better asking on the Edge 1050 forum), but did you try disabling the Turn Notifications in given Course?

this also disables the Turn arrows on the navigation map sadly.
thanks for the tip with the other forum. thought it would be possible with the connect app maybe :) )

From another thread for 1030/1040. Should be similar to 1050.

Navigation Prompts - This setting controls what kind of navigation prompts (TBT) you get if you have TBT enabled when you started a course.  It is found in Activity Profile -> Navigation -> Navigation Prompts. You can therefore see that it can be set uniquely for each activity profile.  Choices are Text Only or Map.  When set at Text Only, the TBT will be presented at the bottom of the current screen when a turn is approaching.  When set to Map, the 530 will jump to the map screen whenever a turn is approaching.  After you've completed the turn the 530 will return to the page you were on automatically.  This setting is changeable during a ride.  I noticed a defect in my testing - when set to Map such that the map comes up as a turn approaches, the distance to the turn does not count down as you approach the turn.  I'll have to play with this more to see if the problem repeats, but I don't like having the Map come up so I don't particularly care much as I'll leave this set to Text Only.  Keep in mind, if the setting in #1 above is disabled, this setting has no meaning as there are no TBT prompts.