Segment Actions docs: payload.obj.integrations['Actions Amplitude'].session_id is undefined in middleware

[GxDesign]

Expected Behavior

The standalone SDK docs for Segment with Actions uses payload.obj.integrations['Actions Amplitude'].session_id for determining nextSessionId. This should be populated when the middleware runs.

Current Behavior

When I log this value, its always undefined. When I log integrations, it gets populated after the middwares run, suggesting it gets applied later in the middleware queue. I've had to use Cookie.get('analytics_session_id') instead.

Possible Solution

If this should be populated, please confirm with the steps below, logging that complete path. We may need a way to ensure the order of any internal middleware accounts for this or provide different instructions.

Steps to Reproduce

1. Follow the docs, using a buffered instance. We call a function, segmentInit to call load on the instance. And then we apply the middleware. We also use a cdnUrl. (Use typescript, we get a lot of type errors following that documentation)
2. Log payload.obj.integrations['Actions Amplitude'].session_id from the middleware.

Environment

• JS SDK Version:
• Installation Method:
• Browser and Version:

[VinceBT-BG]

I have the same issue
The "hacky" solution we came up with was adding a setTimeout

instance.addSourceMiddleware(({ payload, next }) => {
	const storedSessionId = getStoredSessionId()
	setTimeout(() => { // <----- Here
		// We need to wait for the next event loop to get the session id from the payload
		const amplitudeActionsRaw = payload.obj.integrations?.['Actions Amplitude']
		if ('session_id' in (amplitudeActionsRaw as AmplitudeIntegrationData)) {
			const amplitudeActions = amplitudeActionsRaw as AmplitudeIntegrationData
			const nextSessionId = amplitudeActions.session_id
			if (storedSessionId < nextSessionId) {
				setStoredSessionId(nextSessionId)
				sessionReplay.setSessionId(nextSessionId)
			}
		}
	}, 0) // <----- Here
	next(payload)
})

Some help from the Amplitude team would be appreciated because this is not working as documented

[lewgordon-amplitude]

Yeah we're hearing this come up more often and want to find a better solution for this. Thank you for posting your solution @VinceBT-BG .