Norton VPN reducing interned speed massively, but only on my new phone

Norton VPN is reducing interned speed massively, but only on my new phone (Galaxy 14).

15-20 MBS reduced to 0 - 0.5 mbs by turning VPN on.

My other devices...on the same router and Wi fi all work normally with VPN ...at the same time..

This occurred suddenly, after a few days during which my new phone had enjoyed good interned speeds with Norton VPN on.

Any Ideas?

Have you restarted your device? This may clear some caches that might affect your internet speed.