Video mode Automatic sometimes does not act as documented

OS and Version (please complete the following information):

• Operating System: Debian Trixie
• Shotcut Version: shotcut-linux-x86_64-26.8.1.txz from the project download page

Describe the bug Video mode Automatic sometimes does not act as documented: In contrast to what it says, it sometimes sets a frame rate that is different from the first video added.

Steps To Reproduce

1. Start Shotcut
2. Open a New Project, say Project name automatic_framerate
3. Select Video mode Automatic, which says "the resolution and frame rate are based on the first file you add to your project".
4. Quit Shotcut.
5. Restart Shotcut.
6. Open the previously created project, automatic_framerate.
7. The title says: automatic_framerate.mlt ... 25.00fps.
8. Add, as the first video, any video with 60fps.
9. The project unexpectedly remains at 25.00fps.

Expected behavior The expected behaviour is that Shotcut does what it said: The frame rate is determined from the first video added, which is 60fps. Analogously for the resolution.

Can you reproduce this? Thank you a lot for Shotcut!