Hello @fmontero,
Not sure if you’re having the same issue as me, but this snippet of CSS got my popups to appear full screen again, rather than in the middle of the viewport.
.popup_outer_wrap > div {
max-height: 100% !important;
}
.popup_outer_wrap.popup_full_height {
transform: translate(-50%, -50%) !important;
}
.admin-bar .popup_outer_wrap.popup_full_height {
top: 50% !important;
}