Section as a background - position absolute

Hi guys,

I’m lost, can someone please take a look at this preview link. Why is the grey div’s (Div Block 18+19) from Section 2 moving when someone is clicking the FAQ question? I need the Section 2 be behind the Section 1 as a absolute position background so the question are over it and not moving the grey div’s as it doing now.

I was trying almost everything.

Thanks!

Webflow - FAQ-background

Here is my site Read-Only: LINK