Lag and other problems

Hello,

I've used Adobe Photoshop to draw in with the same tablet and have never had these problems before.

Whenever I draw it constantly lags,

For example, if I made a circle it looks halved

Another Problem I have been experiencing is the when im drawing a small detailed object it will open something similar to the "Modify" tab in my Workspace, It is almost as if im right clicking with my mouse while im drawing and it has constantly interfered with my attempts to animate anything, So I  am curious if anyone else has experienced this problem previously and if they know any solutions

I believe there is some correlation between the circles being halves and the tab opening,

my reasoning behind this is the fact that whenever I go to draw said circle I would see a small gray circle/ring appear

this gray circle is the same image that appears whenever the tab would open, so I believe that the computer doesn't register me drawing a section of the circle because of this tab recognizing the possiblility of it being opened but then it gets canceled and the cursor goes to the next location it is and that could be a reason for my halved circles <----- Please take this section with a grain of salt, im ranting and brainstorming at the same time but I still believe this may be the reason for the problems

The problem still stands on how to prevent opening the tab while im drawing, so if my theory is correct that I said previously then if we figure out the problem with the tab opening (grey ring appearing) then it would also prevent the "lag" and the halved circles