G3 Variable Font Bracket Layer not working in Illustrator, InDesign

Hi there,
Does for any one work the Bracket Layer in a variable font within Illustrator, InDesign?
I did some extensive testing; however it never works :thinking:
I run the Glyphs 3108 and Illustrator 2022 and InDesign 2022.

I am aware that the variable font support of all adobe products are not optimal.
However there are some fonts how work in ever version of the Creative Cloud seamlessly e.g. Acumin Variable Concept (see the dollar sign in font).

Does somebody know how to achieve this?

I can provide my G3 test fiel plus ttf output.
The K should change the design when width axes is smaller than 25.
This works in browsers.

Any suggestions would be very helpful, thanks…

VariableFont_BracketLayer.zip (11.4 KB)

Your font works for me in Illustrator:

How do you test:
Testing Your Fonts in Adobe Apps | Glyphs
Eliminating Font Cache Problems | Glyphs

…thank you @GeorgSeifert.
I did clean the Font Cache after my testing.
However this did not change any outcome.

Afterward I did try more desperate measures — I reinstall my complete Adobe CC (all apps). This funny enough did some changes. The test variable font is working now just fine in InDesign 2022 and Photoshop 2022.

However, in Illustrator 2021 (25.4.1) and Illustrator 2022 (26.0.2) the bracket layer is not working.
Do you run Illustrator 2020?

I guess this is just another bug of Adobe in the end :man_shrugging:

How did you install the font? I always use the Adobe fonts folder.

The same here, I used the Adobe font folder as well.

Out of curiosity I did open the Variable TTF file in FontLab 7 and exported an new TTF Variable Font, like this the bracket Layer works for me in Illustrator 2022.
VariableFont_BracketLayer_FontLabExport.ttf.zip (2.1 KB)

FL is using the rvrn feature for the feature variations. That works OK for simple cases but not for glyphs that are substituted already (e.g. small caps). And the font is fine. It can work in Adobe apps. Why it sometimes doesn’t work is not clear, yet.

…got it, thank you Georg for your explanations.