What is Unload Current?

I use my watch forerunner 255.

menu - Routes - Most recent, by name, Favourites, Unload Current

" Unload Current " may be mean that Route line can disappear only 5 seconds,

5 seconds later, Route line will appear again.

Is it right ? or other ?

This sounds like a bug. Does it happen with any route you load? Well take a look and fix it