CSS property BLUR no longer working with IOS 10

Hi all,

I am using some blur effect through css
.blur {
-webkit-filter: blur(4px);
-moz-filter: blur(4px);
-ms-filter: blur(4px);
-o-filter: blur(4px);
filter: blur(4px);

it worked perfectly until updating to IOS10:
the whole div now gets fully white, we cannot see the content anymore.

Did anyone meet this problem and found a way to solve this ?
I know some CSS properties sometimes get deprecated when upgrading browser, but I don’t think it’s the case here.