Missing arrow on select with suitv2

[pulse-mind]

The arrow on select is not displayed
This is the css provided by suit.css:1186

.custom-select, fieldset select:not([multiple="multiple"]) {
    display: inline-block;
    max-width: 100%;
    height: calc(2.5rem - 2px);
    padding: 0.375rem 1.75rem 0.375rem 0.75rem;
    padding-right: 0.75rem \9;
    color: #55595c;
    vertical-align: middle;
    background: #fff url(data:image/svg+xml;charset=utf8,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 4 5'%3E%3Cpath fill='#333' d='M2 0L0 2h4zm0 5L0 3h4z'/%3E%3C/svg%3E) no-repeat right 0.75rem center;
    background-image: none \9;
    background-size: 8px 10px;
    border: 1px solid rgba(0, 0, 0, 0.15);
    border-radius: 0.25rem;
    -moz-appearance: none;
    -webkit-appearance: none;

appearance: none is hidding the arrow.
I guess the background is trying to defined a SVG image but it is not displayed.

It looks like the encoding is not working properly
I think the problem is due to the # that is not encoded properly, it should be %23

But then it displays a double arrow (up/down) instead of a simple arrow (down)