I'm not familiar enough with this part of the code to review this, but thanks!

I saw something very similar to this over the weekend when a new user set a target position in Guided mode. It's not exactly the same issue so this set of patches won't resolve that issue but I reminded me of this issue. Anyway, thanks and I'll review hopefully in the next couple of days.

Merged, thanks!
Nice PR. I made a few small changes:

• split the first commit into two (we like a single commit to only affect a single vehicle or a single library)
• moved the check higher in auto_init so that there can be no side-effects if the switch to auto fails. It's hard to think of how it could actually happen but with the check where it was, the "wp_nav.wp_and_spline_init" line would have been run even though the switch to auto failed.

Thanks @rmackay9 :-)