Play EMM API: Devices.get / Devices.list unavailable for extended duration

Issue Description : After device enrollment, Devices.get() and Devices.list() intermittently return “No Device was found”/an empty list for the same device for an extended duration greater than 15 mins.
This behavior persists beyond the propagation delay described in the documentation, which is 2 mins.

Impact: App Distribution affected

Our EMM supports incremental app distribution:

• Fetch current device policy
• Merge additional apps
• Re-apply policy using Devices.update()

When devices.get() / devices.list() are unavailable:

• We cannot retrieve the current device policy --> Incremental app distribution fails

Detailed Reproduction Steps:

1. Enroll device (afw#DPC_IDENTIFIER managed accounts method)
2. Call Devices.update() to distribute apps that were pre-configured for installation during the enrollment process. Call succeeds
3. Custom DPC adds managed Google Play account on Device
4. Call Devices.List(enterpriseId, userId) → Returns empty for 15+ mins
5. Call Devices.get(enterpriseId, userId, deviceId) → Returns 404 "No device was found" during this time

Queries:

1. What is the expected propagation delay for custom DPCs?
2. How long should we poll and check if the deviceId is listed in devices.list()?
3. Any workflow changes needed from our side?
4. How do other EMMs handle incremental app distribution?