Currency is not showing on product page

I have just started to import via csv my products from my old site to my new one, and for some reason, the currency is not showing on the product page but is on the category page. If you refresh the page the currency appears then goes.

https://www.music-direct-ltd.co.uk/steinway-model-k-vertegrand.html

https://www.music-direct-ltd.co.uk/keys/pianos.html