fumble by a in end zone

[andy1033]

first and 10 for a from a"s 5 yl. A1 drops back into the end zone where he is tackled by the face mask and fumbles. the ball rolls out of bounds at the 3 yl.
this is case book play 10.3.1. Ruling is enforce from previous spot as this is a loose ball play.

I think 10.4.6 and 10.4.7 should apply to the defense or A after a change of possession. There was a problem when B either intercepted in the end zone and fumbled into the field of play or intercepted at in field of play and went into the end zone and fumbled into the field of play.

These plays already had a procedure for A. loose ball foul behind LOS.

10.4.6 makes it a touchback, enforce from 20 and 10.4.7 makes the result of the play so that fouls are enforced from the goal line.

Are we changing the rules for loose ball fouls by B if A fumbles in his own zone and the ball comes out into the field od play. If he fumbles in the end zone and ball does not come back out into the field of play we enforce it as we have always done.