Why are some webpages totally black with dark gray text?

Recently ive noticed when surfing the web that some webpages load fine and others now are completely black with text so dark you cant read it, pictures load fine, ad block is off, private browsing is not on, dark mode is on in both instances and desktop mode changes nothing as far as color goes. I am using the latest ios and before it wouldnt do this.. ever.. included screenshots of webpages just a minute apart.. this is happening to many different pages now.. not just one or two, ive ran into 12 just today on random sites..

also every now and again safari will load a page and display its content then right when it finishes loading the whole thing will go blank with just the original websites background color only and the web address bar displayed. Reloading does same thing and only completely rebooting the iphone or resetting network will let the page load right, maybe.. like 3/5 times.. it seems like apple changes so little each ios and everytime something that is frequently used gets effected..