QCombobox - text jumps around and the dropdown list needs padding - qt

Question

I am modifying an existing Qt .qss stylesheet and am having some issues with readability. Currently, the text in the Qcombobox has no padding when inactive and the padding is applied as soon as I click upon the dropdown.
I would also like to apply padding to the QAbstractItemView so the text does not overlap and has some spacing between the items.
Here's what I have:
And this is what I try to mimick (it's Blender):
This is the code I am editing:
QComboBox {
border: 1px solid #282828;
background: #282828;
border-radius: 6x;
selection-background-color: #303030;
padding-left: 10px;
padding-right: 10px;
/* border-radius changed from 2 to 10px
padding left-right changed to 10px - was 4px*/
min-height: 1.5em;
/* padding-top: 2px; removed to fix #132 > See ExtremeProDark */
/* padding-bottom: 2px; removed to fix #132 > See ExtremeProDark */
/* min-width: 75px; removed to fix #109 > See ExtremeProDark */
/* Indicator - removed to fix #132 > See ExtremeProDark */
}
QComboBox:editable {
background: transparent;
}
QComboBox QAbstractItemView {
border: 0px solid #181818;
border-radius: 10px; /* was 0px */
background-color: #181818;
selection-background-color: #599EB3;
}
QComboBox QAbstractItemView:hover {
background-color:#282828;
color: White;
}
QComboBox QAbstractItemView:selected {
background: #599EB3;
color: White;
padding-left: 10px;
padding-right: 10px;
}
QComboBox QAbstractItemView:alternate {
background: #303030;
}
QComboBox:disabled {
background-color: #4d4d4d;
color: #353535;
}
QComboBox:hover {
background-color: #282828;
border: 1px solid #282828;
}
QComboBox:focus {
background-color:#599EB3;
border: 1px solid #599EB3;
}
QComboBox:on {
selection-background-color: #599EB3;
padding-top: 10px;
padding-left: 10px;
/* shift the text when the popup opens */
}
}
QComboBox::indicator {
border: none;
border-radius: 0px;
background-color: transparent;
selection-background-color: transparent;
color: transparent;
selection-color: #557bb6;
/* Needed to remove indicator - fix #132 */
}
QComboBox::indicator:alternate {
background: #343434;
}
QComboBox::item {
/* Remove to fix #282, #285 and MR #288*/
/*&:checked {
font-weight: bold;
}
&:selected {
border: 0px solid transparent;
}
*/
}
QComboBox::item:alternate {
background: #3c3c3c;
}
QComboBox::drop-down {
subcontrol-origin: padding;
background-color: #303030;
subcontrol-position: top right;
width: 14px;
border-left: 1px solid #303030;
}
QComboBox::drop-down:hover {
background-color: #282828;
}
QComboBox::drop-down:focus {
background-color: #599EB3;
}
QComboBox::down-arrow {
image: url(qss:images_dark-light/down_arrow_disabled_light.svg);
height: 10px;
width: 10px;
}
QComboBox::down-arrow:on, QComboBox::down-arrow:hover, QComboBox::down-arrow:focus {
image: url(qss:images_dark-light/down_arrow_lighter.svg);
}