When there are symbols with the same name in 2 different plugins, the symbol from one of the plugins can't be loaded.

e,g, define a plugin with name "balloon" in a plugin with name "symbol-test". Also have the ionicons-api plugin installed which also defines a symbol with name balloon.

When I now try to show the symbol with 

<l:icon src="symbol-balloon plugin-symbol-test"/>

I get actually shown the symbol from ionicons-api.

Not sure in which order the symbols are loaded. It also overlaps with plugins defined in core.