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Whose slide hardware is this? I need to know that before I can give you that information.
Your manuals should say or sometimes the name is ***** ***** switch or keypad.
If this is a hydraulic slide then chances are good that the racking valve is the issue. If this is an electrical slide then the racking gears may be out of sync. or if this has a Lippert Schwintek system it may be the motors are out of sync. Let me know what you find.
You are most welcome.........get back to me if we need to dig deeper into this.
Hopefully, you got this resolved as I didn't hear back from you. You can always return to this posting again if you Bookmark it and we can do a follow up. All part of our service and please take time to enter a rating as that is the only way I get credit for my time spent helping you. Thanks! Be safe........