Alexa skill needs reinitialising after core or os update

This may be an old topic but cannot find reference in
search.
My apogies if this has been already answered. Has anybody seen the following or is it only me?

It appears that following either major core update or
OS update (cannot definitely say which is culprit) the Alexa Skill connecting to Home Assistant
partially fails. Entities seem to still be recognised but
invoking scripts in HA using activate scene in Alexa fails
Rectified by deleting Alexa HA Skill then reenabling.

Home Assistant 2022.12.8
Supervisor 2022.11.2
Operating System 9.4
Frontend 20221213.1 - latest
Via Nabu-Casa

Always happens for me if I completely kill power to HA. Sometimes happens on a restart, but not as often.