When does the base become a sanctuary?

[IRISHMAFIA]

Originally Posted by jmkupka

R1 on 1B, 2 outs, fly ball to F6 that's drifting toward 2B.
R1, off on the hit, was there pretty quickly, but the last time F6 saw the base, it was empty (relevant?).
No overt action from R1, except for being there, standing still, right before F6 got there.
Collision, dropped ball.
Your call?

What call? There is nothing to call as long as the runner is on the base prior to the collision and does not commit an act of INT