MapView hitTest() doesn't work on certain geometries from FeatureLayer

Question

Hi, noticed that the hitTest on MapView fails to return some geometries, even though it is very clear they should be hit.

I modified Esri sample and introduced a "problematic" geometry on this codepen, this also happens when the features are being loaded from the server:

https://codepen.io/Lucas-Bertoni-the-decoder/pen/jOQWQeV?editors=1000

Here is a video demonstrating/explaining the issue:

https://drive.google.com/file/d/1t4C_QmrEp2z8VrnpRG2rVpKiEfVY7T_o/view?usp=sharing

Has anyone else ever faced such an issue? Why does that happen and how to workaround it?

Thanks.

TimSexton1 · Answer

Could this issue be related even though it is JS API 3.x instead of 4.x?
https://community.esri.com/t5/arcgis-javascript-maps-sdk-questions/snapping-issue-with-arcgis-api-for-javascript-3-x/td-p/1076567

UndralBatsukh · Answer

Would have been easier if your codepen did not return errors. In any case, I am able to see the behavior you describe. If you set the SimpleLineSymbol width to <=1.5 then the hittest returns results consistently at the bottom segment. We will look into this behavior and I will update you once we address it.

LucasBertoni · Answer

Hi, @UndralBatsukh thanks for your response.

As I mentioned in my opening statement, the issue also happens when the feature layer is being loaded from a server (where it is properly configured with all properties). I simply modified an Esri sample to reproduce the issue and provide an example.

Please double-check the video demo I provided, this issue is about the hitTest itself. Your solution is unrelated, notice that in your codepen problem still happens, where the hitTest fails to trigger when the mouse pointer is over this area:

Let me know if you need more details.

Thanks.