For the past two weeks I have been receiving a lot of “unusual network traffic” messages from Google. These require a captcha, which I solve then either the next day or sometimes multiple times a day across multiple devices I get the message again

This is on my home network, no VPN, across all devices connected to my home network.

The only browser extension I use is uBlock Origin for Firefox.

This has become concerning for me and my family so any solutions or advice is much appreciated.