Some Office documents are not automatically opened with Only Office in the browser, but can only be downloaded

[molsondry]

Some Office documents are not automatically opened with Only Office in the browser, but can only be downloaded. This applies to all Office files whose file extension is NOT in lower case. If you change the file extension to lower case, the assignment to the application works again.
This bug here is deterministic. Use small letters for the file extension: application opens, use capital letters: application does not open and download starts instead.
Please look at these screenshots with one capital letter (can be more as well) in the file extension, Nextcloud is about to download (herunterladen in German)

And here the second file name with small letters only, Nextcloud is about to open OnlyOffice:

[arnowelzel]

Well - having an extension ".xlsX" instead of ".xlsx" is a difference. I would just rename the file to fix this.

[enbata]

Hi. We receive documents from third party software and some of them use extension in uppercase. Yes, i know that they should not to do this but we cant do anything.

So, its possible check the extension casting it to lowercase? Not change the file name/extension, only cast it to lowecase when checking if onlyoffice can open it.

Regards