`#show: later` in `#toolbox.side-by-side` corrupts slide titles

[benruijl]

Here is a short code that shows how #show: later in #toolbox.side-by-side corrupts the slide titles and slide counter:

#import "@preview/polylux:0.4.0": *
#import "@preview/metropolis-polylux:0.1.0" as metropolis

#show: metropolis.setup

#slide[
  = Slide 1
  A
  #show: later
  B
]

#slide[
    = Slide 2
    #toolbox.side-by-side[
      A
    ][
        #show: later
       B
    ]
]

#slide[
    = Slide 3
    Test
]

Instead of

Slide 1
Slide 1
Slide 2
Slide 2
Slide 3

I get:

Slide 1
Slide 1
Slide 2
Slide 3
Slide 1

[andreasKroepelin]

Sounds like this:
https://polylux.dev/book/dynamic/later.html#multiple-scopes

[benruijl]

Changing the #show: later in the side-by-side to #show: later.with(strand: 2), I get a compiler error:

error: array index out of bounds (index: 1, len: 1) and no default value was specified
    ┌─ @preview/polylux:0.4.0/src/logic.typ:248:20
    │
248 │       let curr-lc = later-counter.get().at(strand - 1)
    │                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

[andreasKroepelin]

Hmmm strange indeed...