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After waking my macbook air from sleep I can immediately interact with visible apps and launch new ones -- but I can't type, click on webpages, switch spaces/desktops or enter fullscreen. After minutes or perhaps a random amount of time the lockscreen appears. This has happened multiple times, and seems more common after a long sleep.

Last time it happened the lockscreen never appeared by itself and I had to press the power button twice to get to it and unlock the system in order to use it fully.

I find this a bit weird, not to mention unusable. I don't even require the password after sleep in system settings.

Is this a known problem? Are there workarounds?

I'm using High Sierra. Updating to Mojave is not an option.

Update

It seems that I am also unable to enable the security option to require password after sleep or screensaver. As soon as I check the checkbox it unchecks itself.

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