Not sure if this has been reported already, but here goes:
BUG: MapImageLayer does not show in mobile browsers on version 4.19
Reproduce: Open the following sample on a mobile phone (I've only tested Chrome and Samsung Internet browser on Android): https://developers.arcgis.com/javascript/latest/sample-code/layers-mapimagelayer-sublayers/ In my case the mapimagelayer does not show (you can only see the basemap). This bug is only present on the 4.19 version. 4.18 works fine. The bug is not only related to the sample and the service being shown there. It occurs for all mapImageLayers I've tested (several different services).
Could you try this sample using the next version of the 4.20 release? There was a fix put in for certain android devices that looks like it might fix this. 4.20 should be released fairly soon.
Some more information about the problem: When the map loads, the layer is visible for a second, before it disappears. Here is a screen capture showcasing the problem:
Could you try this sample using the next version of the 4.20 release? There was a fix put in for certain android devices that looks like it might fix this. 4.20 should be released fairly soon.
