It’s because we know you’re a robot.

Because brave search cannot tell you apart from the thousands of other android devices. Congratulations, you are anonymous (to brave search who specifically doesn’t try that hard)

because you’re using a piece of software made by the same idiot that came up with javascript in two weeks.
Who is a right wing authoritarian.

Do you use a vpn? I find it get a ton more captchas in general when services detect I’m on a personal anonymous vpn

What mobile provider are you using? I know that T-Mobile IP addresses tend to get me a lot of captchas. And that’s related to their use of CGNAT, which means that the server sees many different identifying characteristics all coming from a single IP address. Also, geoip location of systems is really unreliable for T-Mobile IPs.

It could be because you are switching between WiFi and mobile data or are using a VPN.