Running DAST scan getting 403 Forbidden issue

I’ve added IP ranges in WAF Azure application gateway, now I’m getting intermittent issue seems like IPs are dynamic.

I added these Gitlab IPs ranges set when I checked application log for client_Ips
34.74.90.64/28 and 34.74.226.0/24
35.0.0.0/8 and 34.138.0.0/16

Still getting intermittent issue.