Resource forbidden error when the user has already subscribed to the app

A Resource forbidden error can can be observed on store when trying to access the gateway URL of a web app even when the user is already subscribed to it.
This occurs usually when the another user subscribes, unsubscribes and re-subscribes from the app.

A subscription can be seen in the APM_SUBSCRIPTION table for the relevant user and the app.

<ams:fault>
<ams:code>900908</ams:code>
<ams:message>Resource forbidden </ams:message>
<ams:description>You have not subscribed to this application</ams:description>
</ams:fault>

This is continuously reproducible for migrated apps.