Anyone else getting this small dock icon bug?

lukadook Said:

"Anyone else getting this small dock icon bug?: Thanks. I should’ve said. I’ve tried this already. No joy. This has been an ongoing issue too."

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You are welcome. Having been an ongoing issue, have you tried the following:

Reinstall the macOS:

Nothing would be deleted. It's just that items that have become corrupted or deleted, would be replaced or reinstalled back to where they should be. Go Here: How to reinstall macOS from macOS Recovery - Apple Support. Important: Be certain to create a backup of your Mac prior to all of this. That way, you can have something to restore from the Mac from, should anything go wrong with the reinstall.

lukadook Said:

"Anyone else getting this small dock icon bug?: When I minimise apps into the doc, they appear really small. It seems random though, as other apps appear normal size. The image explains it better!"

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Refresh Finder:

1. Go to: Apple menu
2. Select: Force Quit...
3. Select: Finder
4. Click: Relaunch button
5. Click: Relaunch button

Any Disk Cleaner, Optimizers, Un-installers, etc installed and / or used ?

Should be removed as per Developers Instructions.

They are useless, unneeded, cause havoc and interfere with the normal operation of the OS and may even Corrupt the OS requiring a Reinstallation.

You are welcome.