When opening Factory Planner I get the following error. If it's helpful, I also have AAI Programmable Vehicles installed and I believe this error is there since I have an AAI Hauler autonomously driving around (might be mistaken on the root cause here, though!)

The mod Spidertron Patrols (2.5.8) caused a non-recoverable error.
Please report this error to the mod author.

Error while running event SpidertronPatrols::sp-toggle-spidertron-automatic-manual (ID 317)
Entity is not spider-vehicle.
stack traceback:
[C]: in function 'newindex'
__SpidertronPatrols/scripts/patrol-gui.lua:571: in function 'set_on_patrol'
SpidertronPatrols/scripts/patrol-gui.lua:916: in function 'handler'
core/lualib/event_handler.lua:47: in function <core/lualib/event_handler.lua:45>

Thanks - it looks like you pressed Control+R which is Spidertron Patrol's key bind to toggle automatic/manual patrolling on the spidertron. Maybe you had that keybind conflict with Factory Planner so that's why you thought it was related?

Anyway, the crash is fixed, so if you still have a conflicting keybind it will simply trigger both correctly.

Ref: https://mods.factorio.com/mod/SpidertronPatrols/discussion/6761aa61a9c78fd39602e926