The player signed from Liverpool in 2014 has yet to feature for Hoops despite being two years into his four-year contract.
Loaned out to Huddersfield Town last season the England U21 international injured his knee and has been on the recovery trail ever since.
Robinson was close to being involved against Ipswich Town in February, but picked up a fresh problem 24-hours ahead of the match.
After returning to to full training this week, R’s boss Jimmy Floyd Hasselbaink has fresh hopes for his defender's latest comeback in the U21 fixture against Sheffield Wednesday on Monday.
“Jack is at a very fragile point,” the head coach told www.qpr.co.uk and Tuesday's Fans' Forum audience.
“We got him to where he could almost play matches then he had a setback where he couldn’t train for three weeks because he had a pain in his calf.
“He has had a second injection in his calf to take a cyst away. He trained on Tuesday with the group and hopefully he can have a good week training this week.
“If he does then he can play on Monday for the Under-21s and if he comes through that he will be ready for selection for the next match.”