Font types on mobile version

Hi! I require an aid with font kinds on mobile variation. I make use of PT Serif yet when I updated the Neve motif (July) the font style kind was altered to an additional kind (yet just on mobile variation, on desktop computer it is alright). I attempted to alter it in setups yet without success. Can you assist me, please? Just how can I alter it back to PT Serif? Thanks for your response. L.

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