Rendering issue with Greek characters

[westnordost]

TO REPRODUCE THE ISSUE, FOLLOW THESE STEPS:

Display the text "Σπιτική"

RESULT:

A text that looks something like "Cπιτικη´" is displayed.

EXPECTED RESULT:

"Σπιτική" is displayed

ENVIRONMENT:

• Android
• tangram-es 0.17.1
• Font: Roboto (Android system font that does support Σ and ή, see screenshot below)