Timeout sending report to Alexa

Enabled Alexa through Nabu Casa a few days ago and exposed 60-odd entities. All good, could control and get states on the app. However, yesterday afternoon all entities gradually stopped working on Alexa with Device is unresponsive status. The HA logs have a bunch of:

2025-02-09 08:42:17.243 ERROR (MainThread) [homeassistant.components.alexa.state_report] Timeout sending report to Alexa for cover.stairs_blinds

If I expose a new entity Alexa finds it but marks it unresponsive moments later.

Has anyone seen this? My theory is maybe I’m sending too many status reports to Alexa and getting limited somehow.