Never heard of this issue. Do you have the round rubber "foot" on the bottom of your legs? I would think that would keep the legs from folding under.
Note that older units (before spring 2017) had luan and foam floors and a number of us with the round rubber feet removed them and installed felt on the bottom of the legs. The round rubber feet did not have as much square area as the entire leg does, and it was creating an impression in the floor; the felt allows the entire area of the leg to rest on the floor, resulting less less pressure per square inch.
The newer units have 5/8" plywood for the floor, so the pressure is a non-problem (so far as I am aware).
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1988 Coleman Sequoia - popup (1987-2009) - outlasted 3 Dodge Grand Caravans!
2012 Roo19 - hybrid (2012-2015)
2016 Mini Lite 2503S - tt (2015 - ???)
2011 Traverse LT, 3.6L, FWD
2009 Silverado 1500 Ext Cab, 5.3L, 4x4, 3.73
2016 Silverado 2500HD Dbl Cab, 6.0L 4x4, 4.10
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