Installation of induction hob over an oven

Hi,

I’ve had Whirlpool ACM847/BA installed recently - the manual (screenshot attached below) mentions the following:

“For the distance between the underside of the appliance and the separator panel below, observe the dimensions given in the figure.” - the distance is 20mm.​

As I have an oven installed directly beneath the induction hob, the manual mentions the following:

“If there is an oven beneath the hob, do not install the separator panel.”​

The manual makes no mention of needing to honour the 20mm space between the induction hob and an oven if not using a separator panel.

So my question is, do I need to honour this 20mm space between the induction hob and the oven when not using a separator panel? As is currently installed, there’s a 10mm space between the induction hob and the oven. Should I call someone in to modify the cabinet to ensure a 20mm space?

Thanks.