I3S in Arcgis Online, visibility issues, disappearing geometry

[DavidRasner1]

Hello,

I'm working with a I3S layer in ArcGIS online, created in FME, uploaded as a .slpk and it's doing a weird thing. In certain camera positions, some meshes disappear.

Like this:

Does anyone have any ideas why that is?

I'm thinking maybe lack of LODs? Maybe?

[Geoeki]

I'm also interested in why this is happening...we have encountered the same issue. 

[DavidRasner1]

I did some experiments and when I export the I3S from ArcGIS it's fine. It seem to be the FME writer.

Which is a bummer. 😞