IP got blocked very soon

Hello, I’ve been using NextDNS for a while, but I noticed that sometimes my client IP gets blocked. For example, when I use the IP address X.x.x.x, I cannot continue using NextDNS until I change my IP.

My question is:

• Does NextDNS have rules that block client IP addresses automatically?

• If yes, what conditions or behaviors might trigger such blocking?

Thank you for your clarification.