I had Lippart Thomas Payne furniture in my 2016 RV. After a total of 5 months use (2 winter periods in Florida) the theater seats were falling apart. Stitching was failing, parachute handle recline mechanism cable failed on both seats. Just not good quality or reliability. Not sure anything to do with humidity or heat, they just did not wear well.
I have now replaced them with seats from RecPro. www.recpro.com
Big improvement. More comfortable, cheaper, no stitching in wear areas. All in all a good deal, and they seem to be made by the same company in China, just a better design.
Thomas Payne Collection Heritage Camping World $1387