Had the same issue with the limit switch on our 2017 Isata3.
As far as I could determine is that there was probably something on the stabilizer pad, gravel, sand, etc. which caused the plunger to damage the switch. In essence the plunger between the stabilizer base and the switch got pushed into the switch causing it to fail.
The panel would show 'all up' while the damaged one was definitely not.
I replaced but the plunger and the switch...problem solved.
I suspect it's not corrosion on the switch but it can definitely form on the plunger.
Something to keep and eye on!
Hope that helps
Marinus
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