Cluster pop animation keeps popping when I zoom or move

[mistralaix]

Hi,

I am using the cluster manager in order to display my markers on my map. I wanted to add the pop animation on the appearance of my marker. However every time that I try to move or to zoom on the map, my markers keep re-appearing.
At the beginning, I was just using custom icons on my markers and they kept blinking every time I zoomed or moved on the map. In order to simplify the demonstration, I am just using the pop animation on the appearAnimation of the marker.

First I thought it might been due to the clearItems then to the cluster again so I tried to optimize the renderer a little bit:

func updateCluster(clusterManager: GMUClusterManager, markerItems: [MarkerItem]) {
    var markersToAdd: [POIItem] = []
    var markersToDelete: [POIItem] = []
    for markerItem in markerItems {
        if mapDisplayedItems.contains(where: { $0.id == markerItem.id }) == false {
            let position = CLLocationCoordinate2D(latitude: markerItem.lat, longitude: markerItem.lng)
            let mapItem = POIItem(position: position, id: markerItem.id, picture: nil, markerItem: markerItem)
            markersToAdd = markersToAdd + [mapItem]
        } else if let mapDisplayedItem = mapDisplayedItems.first(where: { $0.id == markerItem.id }), mapDisplayedItem.position.latitude == markerItem.lat && mapDisplayedItem.position.longitude == markerItem.lng {
            mapDisplayedItem.position = CLLocationCoordinate2D(latitude: markerItem.lat, longitude: markerItem.lng)
        }
    }
    for mapDisplayedItem in mapDisplayedItems {
        if markerItems.contains(where: { $0.id == mapDisplayedItem.id }) == false {
            markersToDelete = markersToDelete + [mapDisplayedItem]
        }
    }
    for markerToDelete in markersToDelete {
        mapDisplayedItems = mapDisplayedItems.filter({ $0.id != markerToDelete.id })
        clusterManager.remove(markerToDelete)
    }
    mapDisplayedItems = mapDisplayedItems + markersToAdd
    for markerToAdd in markersToAdd {
        clusterManager.add(markerToAdd)
    }
    if !markersToAdd.isEmpty || !markersToDelete.isEmpty {
        clusterManager.cluster()
    }
}

Then in my renderer method, I tried to optimize it too:

func renderer(_ renderer: GMUClusterRenderer, willRenderMarker marker: GMSMarker) {
    guard let myItem = marker.userData as? POIItem, var markerItem = myItem.markerItem, !markerItem.hasBeenRendered else {
        return
    }
    marker.appearAnimation = .pop
    markerItem.hasBeenRendered = true
}

Environment details

iOS: 15.4
GoogleMaps: 7.0.0
GooglePlaces: 7.0.0
GoogleUtilities 7.7.0
Google-Maps-iOS-Utils: 4.1.0

Thank you for your help!