Bug when recalculating a route from a GPX file with navigation prompts enabled

Hello,

I've encountered an issue when working with routes imported from GPX files.
If I import such a route and start navigation immediately, everything works correctly: all navigation prompts and voice commands are present.

However, if I recalculate the same route in the route planner with the "Include navigation prompts" option enabled, the opposite happens — the navigation commands either disappear completely or only very few remain. As a result, turn-by-turn guidance along the route becomes useless.

Steps to reproduce:

1. Import a GPX file with a route.
2. Start navigation along the imported route — prompts work as expected.
3. Open the same route in the route planner.
4. Enable the "Include navigation prompts" option and slightly move the route's final point to trigger a recalculation.
5. Start navigation along the recalculated route — prompts are missing or very few.

I am attaching a test GPX file.

video demonstrating the problem:
https://drive.google.com/file/d/1efNEcDtAMDRyMdh6cyJKqxmf9Tx69MrA/view?usp=drivesdk

Please look into this issue. Thank you in advance.