This has started a while back, but I'm noticing that if I have Displayfusion running it prevents the default Windows taskbar from disappearing in fullscreen applications (games).
A while ago this did not happen.

The additional DF taskbars disappear as intended from the left and right monitor but the middle one, the one with the normal Windows right-click dialog, shows all the time.

If I shutdown DF, the taskbar disappears as intended.

This doesn't happen for all fullscreen apps, I mainly notice it in games built on a Unity engine.

See attachment for my DF settings, toggling 'Show taskbar in front of full screen applications when they lose focus' makes no difference.

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A workaround I found is to add every affected exe to the DF compatibility settings with 'Disable removing from Windows Taskbar (this application only)' selected.

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Currently running Windows 10 Insider 14352 and DF 8.0 Beta 7, registered version. I have three physical monitors attached in nVidia surround mode for a virtual resolution of 5760x1080, which I use DF's monitor profile with to split it in three 1920x1080 displays.

In no particular order:

Hand of Fate,
Cities: Skylines,
Her Story,
Shelter 2,
Dead Trigger,
realMyst Masterpiece Edition,
Pony Island,
Sunless Sea,
Yandere Simulator (free game),
Infinifactory

basically most games I own that are built on the Unity engine, but not all of them. Gone Home and Kerbal Space Program for example are not affected.

'Real' fullscreen in all cases.
I am mainly using a 1920x1080 resolution but it also happens if I use my full surround resolution of 6000x1080.

Log attached.

Taskbar is not set to automatically hide;
If I disable the DF taskbars the Windows taskbar is properly hidden.

Additional info: adding a compatibility rule for an affected game with 'Disable DisplayFusion Taskbars while this application is running' does NOT fix it, I need to disable the DF taskbars fully, or use the 'Disable removing from Windows Taskbar (this application only)' compatibility setting instead.

Great!

Thanks for checking