Well - I'm still not sure; of course it seems sensible, but I'm having trouble finding any reference to it; the only one I can find would seem to indicate to the contrary...
USTA Comment 26.2: Can a player’s own action be the basis for
that player claiming a let or a hindrance? No. Nothing a player does
entitles that player to call a let. For example, a player is not entitled to a
Let because the player breaks a string, the player’s hat falls off, or a ball
in the player’s pocket falls out.