Using ArcGIS JS API 4.8, when I load a webmap and configure a second basemap from a portalItem webmap, I noticed that the thumbnail of the second basemap is not displayed at startup. You need to toogle it once:
Using a webpack build, I even do not get the main webmap displayed at start up. I need to toogle several times the widget so that thumbnails get loaded.
Any idea ?
Thanks !
Not a bug ? Something wrong made on my side ?
Cheers
Same issue with 4.12
Have you found solution to this? I have similar issue. Thanks.
Nop. I ended up manually setting the thumbnails URL