I have been able to consistently reproduce this issue in the following scenario:
- FS2024 SU3 1.5.4 Base Installation (i.e.: No Standard to Aviator enabled due to a separate SU3 issue - SU3 beta 1.5.1 keeps activating / deactivating marketplace content)

- Empty Community folder
- Airport, Flight Conditions and Time of Day doesn’t seem to matter
If I use one of the airport you indicated, this issue can be reproduced as follows:
- From main menu select “Free Flight”
- Select Airbus A320 Neo (v2) (I don’t think aircraft really matters)
- Select Configure
- Select Save and Back on this screen (you don’t have to change anything on this screen)
- Select Save and Back on the Change Aircraft screen as well
- Enter KSEA as the Departure airport and leave Runway as default
- Select Start flight
- Select Ready to fly
- Press the SHIFT+X Toggle Drone keybind - You will magically be taken far far away…
- Press SHIFT+X again to disable the drone camera
- Chaos ensues… (I have to admit, it’s kinda funny).
If the issue was not reproduced, simply:
12. Press ESC and End Flight
13. Back at the menu, repeat step 2 to 11 above
Note: If you don’t use the “Toggle Drone” keybind but instead select the Showcase camera from the toolbar, the issue will no longer be reproducible until you repeat step 2 - 11 above
Also, I tried with the C172 instead of the A320 Neo v2 with the same results so the aircraft doesn’t seem to matter much either..
Hope this helps solve this annoying issue.