Calendar event edit pop-up partially off-screen in Firefox

Description:
When trying to edit a calendar entry in Nextcloud (using Firefox) in the day-view, the event pop-up window most times appears partially off-screen. This makes it difficult or impossible to either see what you’re typing, change the event category, or click the Save button.

To work around the issue, I have to manually resize the browser window until the entire pop-up becomes visible. This is a bit inconvenient.

Steps to reproduce:

1. Open the calendar-tab in Nextcloud using Firefox in the day-view.

2. Try to edit an existing calendar event.

3. Observe the position of the pop-up window.

Expected behavior:
The pop-up should appear fully within the visible browser area, preferably centered or near the clicked event, so all fields and buttons are accessible.

Actual behavior:
The pop-up is positioned such that parts of it are outside the visible browser window, making some controls inaccessible unless you resize the browser.

Questions:

1. Could this be a bug with the calendar app or with Firefox?

2. Is there a known fix or a setting I can change to avoid this behavior?

Environment:

Nextcloud version: 31.0.2

Firefox version: 137.0.0.0

OS: Windows 11

I’m unable to reproduce this (at least in Firefox ESR).

FF 137.0 is very new; it has has a couple of updates since it was released. (137.0.2 looks to be the latest).

Did the problem start when you upgraded FF?

I am now on FF 137.0.2 but the problem is still occurring.
The problem started a while ago when there was update of the interface of the calender from Nextcloud. Like around January probably.

Does this Issue describe your situation accurately?