I'm using React to create a postal html template that will only show it's content in Chrome, and only Chrome, print mode (ctrl + P).

The problem is: some html elements like span or strong with text on them won't show in the print mode at first, but when you press "Cancel" in the print menu and go to print mode again (ctrl + P), they show correctly.

Although this template is only designed for Chrome, I have tried to render it in Firefox print mode and it works perfectly! I have read that it has to be something related to Chrome's DOM rendering time being too short in print mode, but haven't found any fix yet.