Lowercase “ä” is missing in font subset since v4.2.0 → auto replaced by uppercase “Ä”

[SolunaCG]

Initial Checklist

• I understand this is a bug report and questions should be posted in the Community Discussions
• I searched issues and couldn’t find anything (or linked relevant results below)

Bug Description

Since updating to OpenCloud Web v4.2.0, typing the lowercase German umlaut "ä" automatically converts into uppercase "Ä" immediately while typing. Other umlauts (ö, ü, ß) are unaffected.

This happens globally in all input fields (file names, folder names, editor, etc.). So this affects actual input, not only display rendering.

I noticed in PR #1488 that uppercase Ä appears twice in the shown glyphs (in the first screenshot that @tbsbdr shared), but lowercase ä is not visible there. I am not sure if this is related, but it looked suspicious, so I wanted to mention it in case it helps.

@tbsbdr This looks directly related to the updated font subset.

Version: OpenCloud Web v4.2.0
Environment: Linux (UTF-8), German keyboard layout, Firefox (latest)

Reproduction Steps

1. Create or rename any file / folder
2. Type lowercase ä
3. It immediately becomes uppercase Ä

Expected Outcome

Typing lowercase ä should show lowercase ä.

Actual Outcome

Lowercase ä immediately becomes uppercase Ä while typing.

[JammingBen]

Has been fixed via #1507 - will be included in the upcoming release.