The 24-year-old has struggled since the second half of last season and it has stretched into the start of the 2020/21 campaign as well.
Morelos has scored just three times in the Scottish Premiership and the start of his season was marred by the talk of him potentially leaving Rangers with active interest from French giants Lille and other clubs.
The Colombian is struggling to recapture the form that saw him score goals for fun in the first half of last season and Jelavic insists that it is not new for strikers to go through such lean patches.
He feels that Morelos is struggling due to lack of confidence but insisted that he has not turned into a useless player overnight.
The former Gers star believes that the striker will get back to form at some point as he is too good a goal-getter to continue to be in a rut for too long.
Jelavic told The Athletic: “You can have these moments when you are scoring and then, ‘Bloody hell, I cannot score from the goal line!’
“This is when you have to trust in yourself and it will come.
“You cannot say he is now a bad player.
“He is good but something is may be happening in his head or he is lacking confidence.
“It will come back, for sure.
“You don’t score more than 20 goals and become a bad player.
“You just have to find him again.”
Steven Gerrard is no longer as dependent on Morelos as last season after Rangers signed Kemar Roofe and Cedric Itten in the summer, while Jermain Defoe remains at Ibrox.
