Controller Thumbstick zone

Hello,
I recently replaced my faulty left thumb-stick, and it works well, but when i go in Game Controller Tester if i go up and down it’s all good, but when i go diagonally, it gets out of the circle. I got the replacement part form AliExpress, it looks almost the same, the only difference is that it has some tiny feet spacers on the bottom making it stay higher then the original one.

So, do you guys have any clues or fixes for this issue ?

Thanks!

Your best bet is replacing it with the exact part. 3rd party parts are hit-or-miss. The official part will say Alps on it.