It is likely that a borrower with a fixed-rate mortgage will find themselves paying a higher mortgage rate that what will soon be offered.
One of the cardinal ways that a Central Bank responds to an economic downturn is by lowering the interest rate.
Unlike a borrow with an adjustable rate, whose rate can go up or down, a borrower with a fixed rate mortgage is locked in. SO, they benefit if the rates go up but lose out if they go down.