Feature with icon and no title is not rendered on symbol layer

[Etienne-io]

mapbox-gl-js version: latest

Steps to Trigger Behavior

1. Add a geojson source with a feature that have icon but no title property (or title: ' ' or title: ' ')
2. Add a symbol layer for that source

Expected Behavior

Display a symbol without label

Actual Behavior

Nothing displayed.

If I add the property 'text-optional' on the layer, the icon is displayed properly but as it effects all the data of the layer, I can't use it.

Exemples :
No title with 'text-optional' property

No title without 'text-optional' property

'_' as title with 'text-optional' property

'_' as title without 'text-optional' property

[pathmapper]

Hi @emerciercontexeo, your issue sounds like it is a duplicate of #6160 which has been fixed in #6164.

[Etienne-io]

Didn't found it before, thanks for reporting, I close the issue