The UM3 definition sets the setting to 3mm. Nothing else sets it to another value except FDM Printer. I left the UM3 setting in and removed all travel_avoid_distance settings in the UM3 profiles.
They share the same profiles. They should also have the same settings in the variants, but this is not automatically shared for some reason.
Contributes to issue CURA-3650.
These are now upgraded to version 3, meaning that they will have to increase their version numbers and remove any start_layers_at_same_position settings they define. None of these profiles define any start_layers_at_same_position so it's just the version number then.
Contributes to issue CURA-3479.