Portables still showing in location after removal

## Description
Portables are still being displayed in a location when they should not be visible (possibly after being removed or placed elsewhere).

## Evidence
Screenshot attached in Slack showing portables persisting in the location.

## Expected Behavior
Portables should be removed from the location when no longer present.

## Priority
To be assessed by assignee.

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Requested by Pablo via Slack
Reported by rob