Braces thicknesses

The braces are different thicknesses. What should I do?

It’s been resolved.

Due to the maximum span for braces.

Tell us what you did to cause it?

I don’t know what the problem is. On some pages, when I delete a brace, it doesn’t remove the whole thing but only a part of it, and there are also pages where other braces remain as they are.

k.k it looks like you have a composition with a bass instrument (or singer) and pianoforte.
If you make your signposts visible, you will see brown signpost where you have deleted or changed a bracket or brace.
If you select these brown signposts and delete them, you should get Dorico’s default braces.
If not, did you start this project as an .xml import?

There is no bracket and barline change indication, but why does it look bold?

It’s the same piano, but why does the thickness look different? I’m not sure how to fix this.

I deleted the braces and added them again, but the same problem persists. The braces don’t appear consistently—some show up, while others are missing.

If it is a piano, you don’t need to add braces, they will be present by default - because it is a grand stave instrument. That’s why I wouldn’t do any manual “adding”, make sure your instrument is “piano” or “pianoforte” and Dorico will take care of the braced.