There appears to be a difference in the timing of the dynamic ESS prices.
This is what the https://www.zonneplan.nl/ site is providing
On the vrm page however, seems the rate is offset by 2 hours.
Seems to me like a bug in the system. (note GX has right timezone set)
note: the prices on the zonneplan site are aligned to the published prices at the https://www.epexspot.com/