Slow background colour loading – follow up question

Hi!
I have the same problem as described in this post: https://forum.tagdiv.com/topic/background-color-on-row-loads-last/
and I’ve tried to insert the code that you suggest
.td-header-desktop-wrap .td-element-style {
transition: none!important;
-webkit-transition: none!important;
}
but it doesn’t work. Not sure if I’m inserting it in the right place though. Can you help please?
My site is: https://nordsip.com and you can see the issue when the front page loads, but even more when the posts load (the header is black but the white background doesn’t load, so you can’t really read the headline until it has loaded).

Hello Catalin,
Basically, in the video you sent me, I can still see the issue I mentioned. The WHITE background behind the headline “Will AP1 Exclude Vale?” loads last, which makes it so that the headline, which is in Black Fonds appears against the photo first and is difficult to read.
I have gotten some help from your colleague in the thread of this post https://forum.tagdiv.com/topic/background-color-on-row-loads-last/#post-284294
But still no resolution. Let me know if you know a way where I can get the white background to load first or at the same time as the headline, not last.
Thanks a lot!

You can actually see the problem even better in the header. I can’t change the header in the front page, as the problem is too prominent, but I have changed it on another page:
https://nordsip.com/insights-research-library/
I’ve already entered the code that your colleague suggested, that takes away the “transition effect” so it appears directly instead of fading in, but as you can see, the dark green background loads last and it’s really not great. It would make so much more sense if it loaded at least first, or at best, at the same time.