Analyse charging circuit for a small voice recorder
It seems body diode charges LiPo limited by R4, such that if LiPo is at 3V and Vf=0.7 est. , If=(5-0.7-3)V/4.7ohms = 0.277A  Pd= 0.2W

It may cause a glitch on drain during contact transient via Coss charge, so perhaps not recommended during Record to avoid USB current demand error??