Malfunction

Try deactivating all plugins. If that resolves the issue, reactivate each one individually until you find the cause.

If that does not resolve the issue, try switching to the Twenty Fifteen theme to rule-out a theme-specific issue (theme functions can interfere like plugins).

If neither of those make any difference, are you running any sort of anti-virus or web security software?

I wonder if it’s related to this: https://ww.wp.xz.cn/support/topic/read-this-first-wordpress-44-master-list?replies=5&view=all#post-7759534

You’re welcome!