It does not copy on selection. Well not really, in the same way that nothing is copied with ctrl-c, or right click copy. This is a terrible metaphor, that is used on Microsoft's windows: You right click a file on a USB storage, select copy, eject device, put it in a giffy bag, and hand it the DHL. Then click paste, only to realise that it has not made a copy. The traditional X11 way is to paste previous selection, there is no copy. I miss this working properly, many modern applications use the broken MS ctrl-c, ctrl-v model.

To solve you problem, configure the clipboard manager to ignore selection.

It does not copy on selection. Well not really, in the same way that nothing is copied with ctrl-c, or right click copy. This is a terrible metaphor, that is used on Microsoft's windows: You right click a file on a USB storage, select copy, eject device, put it in a giffy bag, and hand it the DHL. Then click paste, only to realise that it has not made a copy. The traditional X11 way is to paste previous selection, there is no copy. I miss this working properly, many modern applications use the broken MS ctrl-c, ctrl-v model.

To solve your problem, configure the clipboard manager to ignore selection.