This is not about a problem, but rather kind of workaround (or maybe solution as well if integrated or implemented "natively" in Micro ;-))
I wrote a small CopyBox plugin which helps me a lot now, and may be also useful for someone else. It allows you to select text by marking Begin/End of Selection with F3 key, and then Copy it with F5 key into any place you need in your text. Or copy it to file (F4), restore from file (F6) when you want to copy it also to another file(s), or execute it as Shell command/script (F9). This is all by-passing OS clipboard, so may just work (even when I'm opening my SSH session from my iPad ;-))
Of course, you can re-assign key bindings as you like.
Rgds, -Dimitri