Box1 (set to show when page = "...") is no longer shown when Box2 is set to “show everywhere”

[arnelap]

From: https://wordpress.org/support/topic/multiple-boxes-different-filters-prevent-showing/
Hi,
I use multiple boxes on my page.
Box1 has setting “show if page=contact”.

when create a second box I have the following behavior:

Box2 with setting “show if page=contact” shows both boxes as desired.
When I change Box2 to “show if Page!=contact” Box1 is displayed on contact page and Box2 everywhere else.
When I change Box2 to “show everywhere” Box2 is displayed on every page but Box1 is no longer shown on page=contact.
I guess case 3 is NOT the desired behavior of the boxes.

Thanks for help
Chris