Aotec Recessed door sensor - unavailable after battery replaced

Zwave Aotec door sensor battery got low - fair enough - device was then unavailable, so changed battery.

Device works fine - or red LED light comes on as it did before when door opened, but device still unavailable.

Took off device health - as advised - and still not working.

Have done multiple hub reboots and zwave repairs etc…

First time that any device has refused to come back online following a battery change for me, so its a bit concerning in case all the others follow !

I could delete, and add in again but its linked to various routines and apps, and deleting from those and adding in again will be a PITA.

Any quick answers to this ? Do I have to raise a ticket to get ST to fix something on their end ?