What's the problem you're trying to demonstrate?

Do you mind sharing more details about the problem? I haven't tried the beta yet but from your video it looks like I imagined it to work.

I might be wrong, but I think locally overriding styles never was a feature in Sketch, was it? I thought I had seen that somewhere or read about it. But not sure where:

• InVision Studio has no styles at all as of now
• XD only has some kind of unlinked style palette
• and Figma works apparently similar to Sketch but excludes color from the styles (and applies text styles on a character – not layer – level).

Adobe Illustrator and InDesign are probably the closest to what you are presumably looking for. Their implementation is pretty sophisticated, allowing to define which attributes are part of a style and which ones are not. But it is also complicated and hard to see through, if you're not working with styles you've setup yourself.

It's not unintended behaviour. It's how Sketch always handled these styles. If you simply change a value without detaching or updating the style, the next time you update the original style somewhere else these attributes will override the "unsaved" ones.

It's a bit hit or miss depending on what you want. Sometimes it's very useful this way, other times it can be quite cumbersome to deal with it.

Another big issue is certainly how text styles are handled within symbols, because right now it's down right impossible if you want to have multiple text styles within a symbol. How do you highlight specific parts of the text override with another style? Maybe some markup is going to help in the future. I don't have any good suggestions on this yet.

Figma seems to be on a good track to at least solve the problem with multiple styles within text, but I don't know how they deal with symbols.

It looks like it worked like it should...