If you are using the latest version and latest update of Windows 10, take a look at your clipboard and choose what you want to paste using the combination Windows key + V. Then, double-click on whatever you want to paste from the clipboard.
Windows + V opens the clipboard. I can then select an item. Pasting into Miro does nothing (CTRL + V).
To clarify, copying and pasting content within the Miro desktop app itself works fine. Trying to paste content from outside Miro into Miro does not work - it always pastes the last thing I copied from Miro.
I’ve just uninstalled the app and reinstalled it from the Miro site instead of Play Store. Now it’s working - very odd.