CF Worker suddenly stop responding when it is called from a subdomain environment

We have a worker with many environments deployed.

All environments routes are not reaching the CF worker anymore on subdomain since a few hours on the route like [WORKER_NAME].[DOMAIN_NAME].workers.dev. The HTTP response says:

*There is nothing here yet
If you expect something to be here, it may take some time.
Please check back again later. *

The only one working is the production one on the [WORKER_NAME].[DOMAIN_NAME].workers.dev route.

We didn't change any configuration. Are there any incident that can have caused this behaviour? Thanks a lot for your help
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