LiPo rider plus : 5V issue

Hi !

I’m working on project which involves a raspberry-pi connected to a LiPo battery and USB charger.

It’s actually working fine except one thing : When the USB charger is unplugged it takes around two second for switching to battery supplied mode.

So, every time I unplug USB cable, my raspberry is switched off…

Does someone already experimented this ?

I’m supplying a raspberry-pi Zero W

Thank for you help !

Best regards