Could you please double check if this case is a False Positive case?
You block all the sub-domains:
gwi-admin.impactscope.com
gwi-demo.impactscope.com
gwi-reg.impactscope.com
gwi-admin.dev.impactscope.com
gwi-demo.dev.impactscope.com
gwi-reg.dev.impactscope.com
and even the new domain
gwi-admin.impactscope.io
It's 100% domain block because you don't block the direct links from GCP. They pointed to the same place
https://frontend-v2-dot-gwi-env.lm.r.appspot.com/
https://thirdparty-v2-dot-gwi-env.lm.r.appspot.com/
https://gwi-demo-dot-gwi-env.lm.r.appspot.com/