I’m sorry but I do not know how to report the network log of my browser.
Can you guide me?
I know to open the inspector with F12 but after I am lost. And when I try to select text it moves the tags. 
I tried inactivating NoScript and uBlock Origin, it does not change anything.
And everything is configured exactly the same for both sites. Just the execution does not work the same and I do not know why.
nb: I have erased the name of the folders to respect the confidentiality but it is displayed well. No other changes.
ps : I reactivated the Theming app to have the same config on both sides.