Browser mobile version doesnt match actual mobile version

Hi guys,

I’ve recreated this animation from the 21 day portoflio challenge on the above link. The intro animation works well if i open the above link on pc and check responsivity in browser (tablet and mobile included). As soon as I access the link from my phone, 2 cards of the animation disappear and some other elements break?.

Can someone tell me what the problem is?

This is how it looks on my mobile phone

and this how it looks in responsive mode on google chrome from my pc.