In Mockups 3 for desktop I tried to copy a hex code and override a symbol to use it as a border color. Every time I double click the symbol to override it, the copied hex color gets lost from the clipboard. Until this action I can paste it in Balsamiq and every other tool.
It seems to me that I have no possibility to paste a text when overriding a property of the symbol. Manually entering the hex code works fine but I am not able to copy the hex code from outside Balsamiq and pasting it while overriding.
Strange feature if this is a wanted behaviour