Live Ball Touched By R2 Standing on Base

[JPaco54]

Saw this the other night. Competitive Youth League, OBR, U14 age group. Ball Thrown back to F1 by F2, tips his glove and tolls towards 2nd base. R2, while standing on the base, reaches down and picks up the ball and throws it back to F1. Defensive coach starts out of the dugout and asks the PU, what's the call? PU, says "No call...Let's play." And they played on. Tried to research this in Rules and could not find anything related to the offense being penalized for this. If there is a violation, at least a warning should have been given. Then I started to think, what if there was R3 who broke for the plate after the ball tipped F1's glove? Any assistance is appreciated. Thanks!