Text and buttons are jumping. First text appears, then the field becomes higher. I can see the text and button, and then they move below - teleporting.
1 click
2 show wikitext editor
3 Text and buttons are jump up
4 Text and buttons are jump down
+ height of field up to buttons must be equal in the wikitext editor and Visual editor - it is also jumping
+ blue frame becomes bright gradually - it is noticeable
1 from gray to blue
2 more bright top border
3 more bright other border