Async Hangouts Apps Script - user has to auth, leave space, and then return to trigger onAddToSpace(e)

[derrickrc]

I followed the instructions here: https://developers.google.com/hangouts/chat/how-tos/bots-apps-script#async_messages

When someone else in my organization adds the bot, the bot lets them know it requires configuration and takes them to the Apps Scripts authorization screen. Afterwards though, the bot does not function as the spaceId is not captured within script properties.

Only after removing the bot from the space and then re-adding it does it successfully add the spaceId to the App Script project script properties and begin to function.

Am I doing something wrong here or is this expected behavior?

[derrickrc]

I should also note that the user is required to message the bot initially for the "requires configuration" dialog box to appear