Kannaḍa text not rendering in thumbnails

[cadecairos]

Yet another language Blitline cannot render:

https://beta.webmaker.org/#/project?user=464277&project=10785

https://en.wikipedia.org/wiki/Kannada

cc/ @secretrobotron @jbuck

[cadecairos]

Thai is also not rendering

https://beta.webmaker.org/#/project?user=463116&project=10048

[secretrobotron]

Yeah, I've seen a few of these. Pretty sure Thai doesn't render either.

Also saw a lot of improperly overlapping images while going through projects yesterday.