We have the same issue with our 2014 Solaire 297RLDS. We bought trailer May 2018 and furniture was in mint condition. After a moth of use, sofa started checking. Within another month, sofa was peeling and chairs started cracking. By the end of last year, all of the furniture looks like JUNK.
My wife has found some slip covers at Walmart and Amazon to fit the furniture and they look great. We are about to hit the road for a month, we will see if they stay in place.