this is not really a bug, rather an oversight, but certainly something to be corrected.
As the title said, when you link a camera to the view and you change the view, applying transformation to the camera, these transformation are not undoable.
This can be a problem when you want to correct an accidentally moved camera (some camera has to be extremely precisely placed).
Also if this kind of undo worked it could be used as easy undo for view change ... there is a lot of claims about the missing of undo for view change, being able to undo 'locked view camera' transformations could be an elegant solution to solve these two issues.
Thank you for reading.
win 10, hd620
Blender version 2.9 and later