Spots on pineapple plant leaves - Help?

[Edwardb]

This is my first time growing a pineapple in Sydney, Australia. Does anyone know what these yellow marks are? They have begun appearing and correlate to the pictures of the underside of the leaves I have posted as well. It seems to be some sort of structural breakdown on the underside of the leaves?

I am worried it is something bad happening.
Any help?

 

[Sky]

Is this plant in full sun? It kind of looks like mine when they get sunburned. For whatever reason despite being tropical plants I have to keep mine partially shaded or water them incessantly if theyre in full sun.

 

[Sky]

Forgot to mention, itll be fine. Lol. Pineapple plants are like weeds I swear, I bring mine in for winter and rarely water them and they've all set fruit. Very easy plants that self propagate.