[BUG] When using the simple theme, #slide[== subsection_name] will result in a double title.

[ChungLeeCN]

When using the simple theme, #slide[== subsection_name] will result in a double title.

#import "@preview/touying:0.5.3": *
#import themes.simple: *

#show: simple-theme.with(
  aspect-ratio: "16-9",
)

#title-slide[
  = 章标题
]

#slide[
  == 节标题
]

[OrangeX4]

Just use

#import "@preview/touying:0.5.3": *
#import themes.simple: *

#show: simple-theme.with(
  aspect-ratio: "16-9",
)

= 章标题

== 节标题

[ChungLeeCN]

Just use

#import "@preview/touying:0.5.3": *
#import themes.simple: *

#show: simple-theme.with(
  aspect-ratio: "16-9",
)

= 章标题

== 节标题

I believe this is a bug rather than a feature. Other templates do not produce two titles when processing #slide[== section title]. On the other hand, commands like #uncover and #only should ideally be used in conjunction with #slide[...], rather than directly with == section title. Therefore, this bug needs to be fixed.

[OrangeX4]

First, this is a problem caused by touying's design, which you can avoid by #config-common(auto-offset-for-heading: true).

Second, what is the conflict between uncover, only and == section title? I don't understand very well, could you provide a minimum reproducible example?