Google has some sort of human detection that they don't disclose the workings of beyond the little puzzles. I'm guessing that works better on Chrome.

https://www.dailydot.com/debug/google-new-recaptcha-system/

Personally, reCAPTCHA drives me crazy, and I've definitely noted it's been worse since I stopped using or signing into Google products and services. I've contacted several sites using it to ask them to remove it.