Kentia palm browning/losing colour

Hi guys,

I struggle with Kentias. Already killed one in my new flat, and it’s replacement has been doing well for a few months but now looks a little peaky. 

It’s browning in places and a few fronds are definitely losing their deep green colour. Pictures attached. 

Any clues?

Is it sunburn? It gets morning direct sunlight. 

Over/under watering?

Anything else??

Thank you!

M