open devtools, open settings, then uncheck Uncheck 'Enable CSS source maps' 

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Got it. With Dev Tools open hit F1 to open the settings. Uncheck 'Enable CSS source maps' Close the Settings box.

This has worked for my problem with the console opening all the time - I've just restested and this is the only option you need to change. I am sure it will fix your issue as well as it is linked strongly with mine.