What are the common reasons for a NON-B teacher visa denial in Thailand?

Hello TVA fam I hope all are doing well. As I am about to do a non b teacher visa at Vientiane next month I have a few questions that need to be answered. So we know the reasons for a tr visa to be denied but What are the reasons that might lead to a non b teacher visa to be denied? Missing papers? Employer doesn't meet requirements? And if it got denied let's say due to some missing papers, is it possible to re apply at the same embassy on the same week after getting the needed papers seeing it's different from a tr visa being denied? Thanks in advance