Annotation and cluster views are actually re-created when scrolling the map but not re-used (Mapbox) about clusterkit HOT 5 CLOSED

Update: I think the whole issue is related to this function called in this delegate:
func mapView(_ mapView: MGLMapView, regionDidChangeAnimated animated: Bool) { mapView.clusterManager.updateClustersIfNeeded() }

updateClustersIfNeeded() and updateClusters() seem to "delete" the annotation views when not visible (the camera is elsewhere), that could explain why they are recreated each time I scroll fast to the original camera position.

Any fix for this?

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@Lawris any hack for this fix ?

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@GauravTechbirds did not find anything relevant, maybe we should contact Mapbox to ask them what alternative solution could be useful about clustering. Anyhow maybe those hacks could work (not tested yet):

• Slowing down the scrolling speed when searching through the map
• Extend the perimeter where the annotations views are being loaded

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ClusterKit will indeed remove and delete annotations on the map based on zoom or translation. Clusters are computed within a frame which is the visible area + a margin factor. This behavior allows increasing performances on a large set of annotation. If you prefer computing clusters on the entire world map, you can set the margin factor to kCKMarginFactorWorld value (it is actually the default value).

What is the value of your clusterManager's marginFactor property?

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I will close this as a nofix. Feel free to comment later in case you have additional questions!

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