presure in the fuel tank

I went to fill up the micra today and notice that there was a lot of presure in the tank my question is this normal for micras to have this or is something wonrg
 
I haven't checked my actual fuel cap....but there's usually some sort of breather....could be that it's blocked....?
 
There is a breather pipe that normally gets weak on the bend closing up.

It is also pretty common to have pressure there. Well at least it has been for all my micras
 
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