Build a Survey Form textarea

When I click on textarea I lose the backdrop-filter: blur from the form, I can’t understand why that happens.
Here is the project : A Pen by Panos (codepen.io)

Hmm, I tested this with Chrome, Edge, and Opera on Linux and Chrome, Edge on Windows 11 and wasn’t able to replicate. (Firefox doesn’t support this property out of the box yet). What browser/OS are you using? Perhaps it’s a bug specific to one unique combination.

I use Microsoft Edge.