YES. My Kitchen slide also did this. Now I,m original owner and it is a 2017 that I believe only had a two year structure warranty later after this build date they changed to a three year structure. I might expect 3rd owner and two years older they may not feel they owe as much but you dont know if you don't ask for help NICELY.
Mine was bought Feb. 2017 took to dealer April 2018 with broken wall studs to floor next to slide refrigerator end. (dealer said it needed welding and would not do it) I made contact via email with April Goodman an Owner Relations Advisor with Keystone RV
April latter arranged repair with Darrell Turner the Service Center Team Lead with Keystone RV Company Goshen, IN email@example.com
I understand that several technicians from this shop were at the MOC RALLY when I was picking up my trailer following repairs. They were doing free repairs at the Rally.
I was offer factory repair no charge but transport was on me.
So long story shortened a April to September project between Dealer and Factory I got my 2017 Montana 353RL back First of October. Slide removed so wall was repaired/welded also total cable system and frame and rub strip replaced. Cable frame new stronger metal type versus the original that had more plastic structure also larger rub strip installed. (they said this rub strip was thicker.)
This is how it was explained to me.
Now nothing was done to the curb side slide so I expect I may have issues in future BUT it is much lighter, hoping not or I will try roller repair that I will link below.
Another thread you might read - http://www.keystoneforums.com/forums...ad.php?t=28717
Another Idea I saw and I may consider if issues show up again. ON YOU TUBE is to install rollers. Roller found at RV Upgrades see Lippert 276288 J-36 Slide-Out Roller Assembly SEE YOU TUBE
Good luck. Ask if you have any questions I may know answer
Dave & Kathy + Andi & Tucker (Golden Retrievers)
2017 Montana HC 353RL - Sailun S637's, Progressive EMS-HW50C
2017 Ford F350 Lariat CC 6.7L SRW LB, B&W Companion OEM puck mt.