A player gets raid blocked if he is miles away from his base and someone is raiding it.
Even though "distance": 100.0

I have this same issue

Every raid block is gated by a distance check.

However, as stated in the documentation...

The raid "participants" whom may be blocked

• The owner of the base
• The nearby clan-mates of the owner
• The nearby friends of the owner
• The raid initiator
• The nearby clan-mates of the raid initiator
• The nearby friends of the raid initiator
• Anyone nearby (including raiders and bystanders)

My fault. I tested again. Seems to work correctly.