100dvh min-height property causing weird custom code block display

I have pages on my site that are just custom code blocks with Fillout forms embedded. The formatting used to look fine, but recently all of those pages have this huge grey block in the middle. From inspect element I can see that the min-height property (set to 100dvh) is causing the extra space. I tried to target it in custom code using

#page-content .content .spr-content-root {
min-height: 1px !important;
}

but it isn’t making a difference. Anyone have any tips?

Thanks so much!