Selection tool does not work properly. It selects the total anchor points of an object, however it does not behave as the Direct Selection Tool, it only allows to move the object. It does not allow to resize. a single or multiple objects selected.

Doing undo (cmd + z) Illustrator often deletes more than one step and resets the document close to its original/previously saved version.

Illustrator version: 23.0.3
OS: Mac OS Mojave 10.14.4