All bugs go right HERE and will surely be investigated in a few days.
I know, but I tried to reproduce the bug on stand-alone .capx file, and I could not reproduce it outside.
Moreover I used third party outline effect...
But now it does not matter, I found the cause and the solution:
WebFont in a wierd combinations and only on iOS devices.
Reproduced on iPhone, iPad and iPod...
Fallback solution - indicate iOS device and change the font to a standard one (hopefully similar to a desired one).
Generic, little ugly, possible could be prettier, but it works.