im unclear what ‘mystery update’ your referring too
we had 2 updates last week, on thursday we had the delayed WU number 8 listed here
then 1-2 days later? (location dependent) we had a Dev update shown here
admittedly the dates dont line up exactly, since the first update was delayed
is this on pc?
its tagged as xbox but that looks like a pc monitor, possibly used for a console?
you should give as much information as possible, there are many help topics with Many solutions for this issue