Texts are blurry in the codebox when I dragged

[Violet-Bora-Lee]

symptom:

reason of the blurred text(shadow):

after modifying css:

[iliakan]

Which browser/OS is that? How to reproduce? Just select and drag?

[Violet-Bora-Lee]

Win10/chrome. Yea you could reproduce when you drag the texts in the codebox

[iliakan]

Right, sorry for the delay.
Not sure why this shadow was even needed.