Does it hapen on other pages?
From a web-dev view, looks like Netflix is using their own font ("Netflix Sans"). Not sure why smaller text has the right characters, but Chromium browsers (Chrome and Edge) may not be loading the font correctly or encoding may not be correct (should be UTF-8).
You can open Chrome's Dev Console (press F12) and in "Console" tab check if there are any errors when you refresh the page.
To troubleshoot, you can check the font and style of headings and smaller text. One of the buttons in Chrome's Dev Console is "Inspect" - when you click yhat and hover over the heading, you'll see some info about the font.
Frontend is not exactly my thing so a bit of a guess, but if Chrome is not loading a font or the font doesn't have special characters defined for a style, it may try to use browser's default font (which again may not have special characters, etc.) - you can check Chrome's font settings in Settings -> Appearance
EDIT: I'll set Chrome to Swedish and see if I have the same problem when I'm back home
