core: Can't read discover info | Timeout on /discovery request

The problem

on each restart this is in the logs:

2021-04-07 14:45:39 ERROR (MainThread) [homeassistant.components.hassio.handler] Timeout on /discovery request
2021-04-07 14:45:39 ERROR (MainThread) [homeassistant.components.hassio.discovery] Can't read discover info: 

reported before in https://github.com/home-assistant/core/issues/17266 and https://github.com/home-assistant/core/issues/30751 which were both closed because of stale.

What is version of Home Assistant Core has the issue?

2021.4.0b6

What was the last working version of Home Assistant Core?

never

What type of installation are you running?

Home Assistant OS

Integration causing the issue

hass.io

Link to integration documentation on our website

No response

Example YAML snippet

No response

Anything in the logs that might be useful for us?

2021-04-07 14:45:39 ERROR (MainThread) [homeassistant.components.hassio.handler] Timeout on /discovery request
2021-04-07 14:45:39 ERROR (MainThread) [homeassistant.components.hassio.discovery] Can't read discover info:

as of late, these log lines have been added to the above:

2021-04-07 14:41:49 ERROR (MainThread) [homeassistant.components.hassio.handler] Timeout on /supervisor/info request
2021-04-07 14:41:49 ERROR (MainThread) [homeassistant.components.hassio] Failed to to call /supervisor/info - 
2021-04-07 14:41:49 ERROR (MainThread) [homeassistant.components.hassio.handler] Timeout on /info request
2021-04-07 14:41:49 ERROR (MainThread) [homeassistant.components.hassio] Failed to to call /info - 
2021-04-07 14:41:49 ERROR (MainThread) [homeassistant.components.hassio.handler] Timeout on /core/info request
2021-04-07 14:41:49 ERROR (MainThread) [homeassistant.components.hassio] Failed to to call /core/info - 
2021-04-07 14:41:49 ERROR (MainThread) [homeassistant.components.hassio.handler] Timeout on /network/info request
2021-04-07 14:41:49 ERROR (MainThread) [homeassistant.components.hassio] Failed to to call /network/info - 
2021-04-07 14:41:49 ERROR (MainThread) [homeassistant.components.hassio.handler] Timeout on /resolution/info request
2021-04-07 14:41:49 ERROR (MainThread) [homeassistant.components.hassio] Failed to to call /resolution/info - 
2021-04-07 14:41:49 ERROR (MainThread) [homeassistant.components.hassio.handler] Timeout on /os/info request
2021-04-07 14:41:49 ERROR (MainThread) [homeassistant.components.hassio] Failed to to call /os/info - 
2021-04-07 14:41:49 ERROR (MainThread) [homeassistant.components.hassio.handler] Timeout on /addons request
2021-04-07 14:41:49 ERROR (MainThread) [homeassistant.components.hassio] Failed to to call /addons - 
2021-04-07 14:41:49 ERROR (MainThread) [homeassistant.components.hassio.handler] Timeout on /store request
2021-04-07 14:41:49 ERROR (MainThread) [homeassistant.components.hassio] Failed to to call /store - 

add-ons: Samba share (9.3.1), Duck DNS (1.12.5), Terminal & SSH (9.1.0) IDE (2.2.0), MariaDB (2.3.0), AppDaemon 4 (0.5.1), Home Assistant Google Drive Backup (0.103.1), Log Viewer (0.9.1), Portainer (1.4.0)

System Health

version	core-2021.4.0b6
installation_type	Home Assistant OS
dev	false
hassio	true
docker	true
virtualenv	false
python_version	3.8.7
os_name	Linux
os_version	5.4.83-v7l
arch	armv7l
timezone	Europe/Amsterdam

Home Assistant Cloud

logged_in	true
subscription_expiration	May 1, 2021, 2:00 AM
relayer_connected	true
remote_enabled	false
remote_connected	false
alexa_enabled	false
google_enabled	true
can_reach_cert_server	ok
can_reach_cloud_auth	ok
can_reach_cloud	ok

Home Assistant Supervisor

host_os	Home Assistant OS 5.12
update_channel	beta
supervisor_version	supervisor-2021.04.0
docker_version	19.03.13
disk_total	116.5 GB
disk_used	11.8 GB
healthy	true
supported	true
board	rpi4
supervisor_api	ok
version_api	ok
installed_addons	Samba share (9.3.1), Duck DNS (1.12.5), Terminal & SSH (9.1.0), IDE (2.2.0), MariaDB (2.3.0), AppDaemon 4 (0.5.1), Home Assistant Google Drive Backup (0.103.1), Log Viewer (0.9.1), Portainer (1.4.0)

Lovelace

error	failed to load: timeout

Spotify

api_endpoint_reachable	ok