As per screenshot it seems like there is no issues in dashboard configuration. can you share server screenshot in which you are having spaces.
Do you have any kind of user filters on this dashboard which suppose to filter out some of data and you might having little bit less records than desktop?
User filter as in ?
Well yes it has got near about 11 Filters, but When i am testing them on desktop then its not shrinking this extra space is coming out on server only
on desktop it is edge to edge fit
is there any chance that server 10.5 is having bug as it is very old version
This is a common Windows issue:
Take a look here:
and this about best practices on formatting:
That should fix things.