I haven't logged every event nor seen any pattern but even pasting simple text is often an issue. I've switched from years of using [censored] ( very good program from a company that has lost it way in the last few years ) and like the way they simply share the clipboards.
With RU, there seem to be conditions to that sharing and it is VERY distracting when trying to help a client. All I can tell you is that the weird complexity of the clipboard status in RU seems unnecessary but, the relative minor clipboard issue is one of the few disappointments with RU until you guys release the 6.3 upgrade disaster. I needed to hear back from support on my ticket about that ASAP but, so far, not a peep!