Flickering of solved quests on zoom

[RubenKelevra]

This is super minor:

There's some flickering going on, when zooming. The already solved quests do show up for a split second and disappear again.

This also occurs when autoupload is on.

Tested version: 17b3
https://youtu.be/NYgtkI5tU7U

[westnordost]

Yes, this is a known problem with the new tangram-es, see tangrams/tangram-es#2133
But anyway a huge improvement because before, the whole map used to flicker.