addon-cloudflared: Domain is not a valid hostname

The problem

FATAL: 'xxxc is not a valid hostname. Please make sure not to include the protocol (e.g. ‘https://’) nor the port (e.g. ‘:8123’) and only use lowercase characters in the ‘external_hostname’. No change worked fine before the update.

What version of Cloudflared has the issue?

4.2.8

What was the last working version of Cloudflared?

4.2.7

What type of installation are you running?

Home Assistant OS

Add-on YAML Configuration

external_hostname: 
additional_hosts:
  - hostname: 
    service: https://xxx.xxx.xxx.xxx:8123
tunnel_name: HomeAssist

Anything in the logs that might be useful for us?

-----------------------------------------------------------
 Add-on: Cloudflared
 Use a Cloudflare Tunnel to remotely connect to Home Assistant without opening any ports
-----------------------------------------------------------
 Add-on version: 4.2.8
 You are running the latest version of this add-on.
 System: Home Assistant OS 11.0  (aarch64 / raspberrypi4-64)
 Home Assistant Core: 2023.10.3
 Home Assistant Supervisor: 2023.10.0
-----------------------------------------------------------
 Please, share the above information when looking for help
 or support in, e.g., GitHub, forums or the Discord chat.
-----------------------------------------------------------
[18:58:30] INFO: Checking add-on config...
[18:58:31] FATAL: ' is not a valid hostname. Please make sure not to include the protocol (e.g. 'https://') nor the port (e.g. ':8123') and only use lowercase characters in the 'external_hostname'.
s6-rc: warning: unable to start service init-cloudflared-config: command exited 1
/run/s6/basedir/scripts/rc.init: warning: s6-rc failed to properly bring all the services up! Check your logs (in /run/uncaught-logs/current if you have in-container logging) for more information.
/run/s6/basedir/scripts/rc.init: fatal: stopping the container.

Steps to reproduce the issue

No realy

Additional information

No response