Hi Shalimar,
I suspect the key detail here is the Combo Box's filter type.
Since you're already using On filter input change to query your locator service, I'd be interested to know which local filter setting you're using:
From your description, it sounds like the locator API is already returning the correct result (5 E Main St), but the result is being removed afterwards. If that's the case, I wonder whether the Combo Box's client-side filtering is conflicting with the matching logic used by your locator provider.
Have you already tested the different filter modes, especially None? Since the external provider is already responsible for finding matches, additional local filtering may not provide much value and could potentially explain why valid address suggestions are excluded.
Also, can you confirm whether the result is visible in the datasource before the Combo Box displays the options?
I hope this helps narrow down the root cause. If you can share the filter mode you're using, it may help identify whether this is a configuration issue or a limitation of the current Combo Box behavior.
Best regards,
Oswaldo Valles