this problem probably appeared with the last update of Chrome. Unfortunately I cannot reproduce it here. Neither on my MAC nor on a Windows computer with Windows 10.
Can you send me some more information? Which Windows version do you use and which version of the Chrome Browser?
The problem exists as long as the HTTP_REFERER is passed incorrect or empty.
Using Windows 10 and Chrome : Version 87.0.4280.88 (Build officiel) (64 bits)