This may be a silly thing to ask...but are you using the right type of TP? We have some at home that will rip the hyde off a grizzly. The RV TP is more delicate to dissolve, obviously.
Be sure the bowl has plenty of water. We do NOT skimp on toilet flushing water. We also have an angled drop. Bathroom on the patio side, and the tank slightly behind the bathroom. Snake the toilet and the vent. And be sure you use plenty of water for flushes. We've never had an issue.
Jeff and Melissa - Roodie and Jaxson
US Navy Vet - Good Sam Life Member 804274173
2019 Hurricane 29M
2016 Honda HR-V toad