I have been experiencing similar issues for months, long story short my recaptcha solutions keep getting rejected, this problem persists across all websites using recaptcha, switching to another browser helps temporarily, I have disabled all extensions, tried clearing cache, even restoring default settings, this problem has appeared in four browsers on two different computers with different ISPs, plus lately even my smart phone's Chrome which I have only used a few times, so in total the problem is the same on all sites using recaptcha when browsed using any of the five browsers on three different devices using three different ISPs.
And yes, all browsers are the latest versions.