Its a massive app, more than 30,000 lines.
I think it has something to do with these line in the manifest
SetActivityAttribute(Main, android:windowSoftInputMode, "stateHidden|adjustPan")
SetApplicationAttribute(android:theme, "@android:style/Theme.Holo")
I had to use them because in certain devices cursor disappears.
Add t.Color = Colors.Red as you told, shows the cursor. The problem is that cursor is white and the box is white also.
But what I dont get is that if the editbox is added in a designer layout, cursor is something like blue and everything works fine.
What I'll do is to use a darker color for this textbox. Not what I wanted but is something....