This is becoming painful, because stacks forces text to become fixed width instead of auto, responsive symbols break frequently.
Everytime you try to put text to auto anima forces it back to fixed. Why?
This was fixed in recent versions. Please update and restart Sketch: https://www.animaapp.com/changelog
With a manual download from anima this appears to be fixed, however sketch is not picking up the 3.0.14 update