Is this a LBR violation?

[WestMichBlue]

B1 hits ball to outfield, misses 1B, and beats the throw into 2B. Ball is returned to F1 in the circle. F3 is calling for the ball, claiming B-R missed the base.

R1 (former B-R, former B1) realizes her error and breaks for 1B.

Would you call a LBR violation?

If R1 is trapped on 2B and not allowed to return, would you then allow the defense's request for time to make a dead ball appeal, thus not risking a throw? If F1 makes a throw, then the LBR is off and R1 can return. F1 could make a bad throw and R1 might escape safely back to 1B. So - is it fair to use the LBR to aid the defense, who should be required to successfully execute a live ball appeal?

WMB