.ics calender with "CLASS:public" imported with property "when shared hide this event"

Steps to reproduce

1. import .ics caleder via setting->import calender into a new calender
2. share with other users

Expected behavior

when sharing this calender, the entries should be shown to the shared users as well, which it does not do

Actual behavior

to see this entries for shared users

following problem:

• import .ics calender file with calender entries. these entries contain a property "CLASS:public", which should indicate that the import policy of this event translate to the the property "When shared show full event". In case of writing "public" lowercase, it results in property "when shared hide this event"
• Workaround: replace all "CLASS:public" with "CLASS:PUBLIC" in .ics file (via notepad++ etc.)
• Fix: seems like implementation is case dependent after CLASS tag

Calendar app version

No response

CalDAV-clients used

No response

Browser

Microsoft Edge, Firefox

Client operating system

Windows

Server operating system

No response

Web server

None

Database engine version

None

PHP engine version

None

Nextcloud version

No response

Updated from an older installed version or fresh install

None

List of activated apps

Nextcloud configuration

Web server error log

Log file

Browser log

Additional info

No response

No files or tests are identified in the report. Start by tracing the .ics import path and how the CLASS property is converted into sharing visibility, then reproduce the case-sensitive behavior and verify that lowercase and uppercase public values produce the intended shared-event visibility.