There is a strange icon in the lower right corner

Asked by autumn

When I open Android studio and create a new project, a strange icon appears in the lower right corner of the plank and replaced the original icon. The icon is probably black and white with a red dot on it. I don't known whether it's a bug,but it really affected my development experience, especially for my obsessive-compulsive disorder.

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Launchpad Janitor (janitor) said :

This question was expired because it remained in the 'Open' state without activity for the last 15 days.