Two things about the working of CAS
One of the topics that I will coment below refers to the x = icon for solving equations and the other topic is what happens whit File -> New and objects defined in CAS.
First topic: It is possible that in the version 22.214.171.124 WebStart (28 december) the icon x = not work to solve an equation of first degree? (but it works correctly for solving systems of equations) (!)
Second topic: It seems to me that when we have objects defined in the CAS and we do File -> New, these objects (or "some of these objects") are still not been removed.
File-->New is working well?
Should not happen that with the action File -> New all items "disappear from memory?"