Why vertical text overlaps and how to fix it
If vertical text overlaps when you view it in live preview or on your published site, this may be caused by how your browser handles rendering. At this time, this is not something that can be resolved on the Studio.Design system side.
That said, the following methods have been known to fix the issue. Give them a try:
Set the width of the vertical text box or its parent box to a fixed value (px) instead of auto.
If that doesn't resolve it, try setting the width of the element itself that's displaying incorrectly to a fixed px value.