Inconsistent behavior of api.picker.open

michaelodden

Hello,
After upgrade to API v4, and trying to re-enable the weather-picker I observe some problematic behavior.
The picker sometimes displays only the vertical line and the close "x"-button, but no value-label.

In JS-console the following warning is generated:

interpolator: Undefined dTile     lib.js:94

It seems to be mostly happening when having a quite wide map (~2000+ pixels in x direction) while on zoom level 3.
Redoing the tests on other zoom levels width reduced width of map/window usually works as expected.
Sometimes it (the value label) seems to also reappear after doing some panning, but have not been successful in identifying exactly how/why that is.
Tested with Chrome 74.0.3729.131

Any input on how to proceed is appreciated, thanks.

Steps to recreate (option 1, MWE):

https://jsbin.com/tunonufedu/1/edit?html,output

Steps to recreate (option 2, on live windy map):

Open https://api4.windy.com/
Enable developer tools
Zoom map as far out as possible (level 3)
Move view to (e.g.) 0, 0 (to see the :

W.map.setView({lat:0, lon: 0})

Trigger a "picker":

W.picker.open({lat: 0, lon: 0})