on admin theme edit ccs page
if you refresh the page you lose any custom ccs
the textra input goes blank
allowed user to customize dashboard, then enabled profile cover plugin, cleared cache the box still tick
aactivated profile snippets, cleared cache, checkbox is still ticked.
type jibber-jabber in the CSS section, saved it, cleared the cookies, everything is there, nothing is gone.
Probably that is important I disable cache-extreme plugin, you forgot about that.
did you leave it ticked and activate profile snipets as its unticked now
but i will test