Incorrect display of the accent mark in Cyrillic characters

[sergtsar]

Describe the bug
When entering Cyrillic characters with a diacritic accent mark, the accent mark appears shifted and uneven relative to its intended position.
When entering Latin characters, everything appears correctly, as expected; this position can be used as a reference.

To Reproduce
Steps to reproduce the behavior:

1. Install the latest version of the Inter font and open any text editor that will display this font.
2. Enter any Cyrillic character (most relevant for vowels)
3. Add a diacritic accent mark (if using a phone keyboard, hold down the vowel key until its accented variation appears; on a PC, I use a custom keyboard layout). Alternatively, you can copy a pre-made Cyrillic letter with an accent mark from somewhere.

Expected behavior
The accent mark is positioned neatly and evenly above the Cyrillic letter, not clumped with it. As an example, see the bottom part of the attached screenshot, Latin letters.

Screenshots

Environment

• OS: Windows 11 Home
• Adobe Photoshop CC 2019 and any website.
• v4.1

Additional context
In the variable version of the font (.ttf) in Photoshop, the accent marks are also shifted for Latin characters (as in the top part of the screenshot), but in the not-variable version of the font (I used .otf), everything is as in the bottom part of the screenshot.
In the web version of the variable font (.woff2), the display is also identical to the bottom part of the screenshot.

[kenmcd]

Upper Latin with InterVariable - this should work.
This points to an issue with the application.
I have tested the released font and it should work.

The Cyrillic does not work in either case because the base characters do not have top anchors - so the acutecomb has nowhere to attach.

Lower Latin works as expected because it has the needed anchors on the base characters.

Inter will need to have the anchors added for the Cyrillic vowels.

Further testing....

Segoe UI on Windows 11 is now variable.
And it has all the needed anchors so the Cyrillic also works.
Try testing that in your app.

Source Serif 4 variable (OFL) by Adobe should also work.
It has all the needed anchors in both Latin and Cyrillic.
Test the TTF variable, not the OTF variable.
Test to see if it works 100%.
It should.