Symbol Layers blink at mid zoom level

[tobias-r]

Hi Mapbox,

we have another question, it's not crazy serious, but it's been there for a while and maybe there is a fix we do not know about?

Our symbol layers flicker as in video at a certain zoom level:
https://findpenguins.com/Mapbox-Flickering.mp4

The exact same happens in Android AND iOS.
Zoomlevel when it occurs: When the smaller roads appear, our symbol layers blink, some even fade out-in quickly.

Newest MapBox SDK versions.

Symbollayer is not really added any special, layer + source.

        val layer = symbolLayer(layerId, sourceId) {
            iconImage(Expression.get(ICON_IMAGE_ID))
            iconRotate(Expression.get("icon-rotation"))
            iconAnchor(IconAnchor.CENTER)
            iconAllowOverlap(true)
            iconIgnorePlacement(true)
        }

Any help would be appreciated!

Best,
Tobias

P.S. Sometimes our symbol layers also disappear entirely on a simple map drag. This only happens around this exact zoom level.

[OdNairy]

Hey @tobias-r
Is it on the same zoom level all the time? Could you replicate it on the different zoom levels?
May I ask you to enable the camera coordinates debug view (mapView.debugOptions = .camera) and record the video one more time?

Also could you try it with mercator projection?
try! mapView.mapboxMap.setProjection(StyleProjection(name: .mercator))

[tobias-r]

Hey @OdNairy,

it happens in Android & iOS both at the exact same zoom level, zoom 6. It doesn't blink with mercator.

See videos:
https://findpenguins.com/Mapbox-Flickering-2.MP4 (still blinking, debugOptions = .camera)
https://findpenguins.com/Mapbox-Flickering-Mercator.MP4 (not. blinking, mercator)

What I am also seeing is, on the website at the zoom 6 threshold, all the place labels blink, not our layers however:
https://findpenguins.com/Mapbox-Flickering-Web.mov

Just to repeat, on Android AND iOS if at exact zoom 6, our layers disappear entirely on a regular basis! They reappear magically on any further zoom change.

Best, Tobias

[OdNairy]

Thanks Tobias
I've open a ticket MAPSNAT-3549

Would the mercator projection be a workaround for you?

[tobias-r]

Not at all, unfortunately.