What do the different colours on the LED mean when putting a new battery into my ST multipurpose sensor?

I have various v2 multipurpose sensors in and around my home. A few are currently marked as ‘offline’.

What surprised me is that when I swap out batteries in them, some flash blue a few times, others green.

Can someone confirm what these colours mean because amazingly there is nothing about this in the supplied manual.

Blue flashing means that it’s not joined, but if it flashes blue and then green and then stops means it’s part of a Zigbee mesh. If it just flashes green after putting in the battery, it means it’s already part of a zigbee mesh. In both situations, after flashing green you should see those devices go back online.

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