The "Auto Size" property stopped working since 1.18.
In Theme Editor, Labels with Auto Size shrink to a single pixel.
In ATVO, Labels with Auto Size retain their original size, and any text that would make the label bigger is left out - the text is not resized to fit the Label as it would normally.
Adding image for clarity. Top = before update, bottom = after update.
The small text ("MELHOR VOLTA", "ÚLTIMA VOLTA") is set to Auto Size. The small text and the lap time next to it make a SubWidget set to Stack children.
I've seen the issue but I have no clue what is causing it... Nothing changed in this code. I also can't explain the difference between running in ATVO and theme editor... I'll look further.