Help with Four nano ch340g on one board

[TomGeorge]

Hi,

@hydrolisk1792

Every time I have used just normal metal can crystals in the past I have had to put caps in place.

Yes that would be my view too, why I don't know, you may have to put some pads down in case you need too.
I have had a look at many CH340G circuits on Google and they all seem to have 22pf caps on the crystal as standard.

Tom...