Conditional Symbol markerFile

maptalks's version and what browser you use?

Maptalks version: 1.0.0-rc.14
Browser: Firefox, 106.0.5

Issue description

I have a geojson file with several features in. I want to use different symbols for representing each of the features, conditional on values of the feature (such as latitude, longitude and other properties).

I would expect to be able to use a standard if, else function to assign a symbol to each feature (as shown in the reproduction URL).

However, doing this leads the symbols to overlap on each other. Specifically:

• the first feature in the collection is shown with the correct symbol correctly
• the second feature is shown with the correct symbol and the symbol of the first feature.
• so on...

Please provide a reproduction URL (on any jsfiddle like site)

https://codepen.io/jokroese/pen/NWzwPeV

Note how the symbol for Berlin (the second feature of the collection) has both the (correct) Berlin symbol and the (incorrect) London symbol.

Start with the CodePen reproduction for issue #1843 and inspect how conditional symbols are assigned to the GeoJSON features. Verify the behavior using maptalks 1.0.0-rc.14 in Firefox. Done means each feature displays only its own conditional symbol, without symbols from earlier features overlapping it.