I would check your settings. Go to second screen, make sure it is on and tap show when main screen on. Make sure app shortcuts is checked and tap the settings wheel and see if it is there, if not add it.
I did, I removed the short cut. uninstalled quickmemo+, reinstalled quickmemo+, added the capture+ short cut. everything else works on the second screen. I have Clock ->capture+ ->calculator ->settings. And they all work fine except Capture+.
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