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is showing up multiple times in the Dock. It's only open once. How do i stop this?

I have opened an app once, but it shows up two more times in a different middle section between two lines.

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Is this an app misbehaviour or an macOS one? I can't tell and I'm not sure where to troubleshoot. This is the only app it happens with.

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    What app is it? – l008com Oct 12 '18 at 22:14
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    Are you running macOS Mojave? – Monomeeth Oct 12 '18 at 23:28
  • What happens when you try to drag the other ones out of the dock? – abc Oct 13 '18 at 0:14
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Apps with support for opening documents minimize into Dock in their own separate icon. To disable that behaviour, check Minimise windows into application icon under System Preferences → Dock.

macOS Mojave has a configuration to show recently used app's icon in the Dock (just like in iOS 11 and later). To disable it, uncheck Show recent applications in Dock under System Preferences → Dock.

enter image description here

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    Thanks, Can't believe i didn't notice this was a thing sooner – spezticle Oct 15 '18 at 5:44

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