In 11.5 have a look at Edit > Preferences (Ctrl+E)
under "document" is a dropdown for setting the camera rotation.
Should be set to "object", if you want your cam to pivot around the selected object.

The above setting can be changed for each camera via the viewport menu...
In your viewport go to menu Edit > Configure (Shift+V) 
In the attributes window goto the "View" tab.
Click on the small triangle in front of "linked camera" to unfold it's settings.
Under the "object" tab you can set the "Rotation".
If it's set to "default", it will obey the settings from "Preferences".

 

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