Less power to USB Port

Hi everyone!
Apologise if such post already exists, I couldn’t find any. If there is - please redirect me.

In short, one of the USB is working fine, releasing around 5 V and charging. The second one however is releasing less power for some reason - around 3.30 V.

I couldn’t find any shorts on the board, but I could be wrong. Could you please point me at some direction, to continue identifying the problem?

Thanks in advance!