Like any other property, set the bar for expectations and rules and it should perform well.

Conversely, are there common traits among sponsors who’ve consistently performed well?

If you are a couple years in, I'd give them some grace and work on a payment plan with them, but being clear that if they fail to perform, you'll have to serve them a 3 day notice and react accordingly. 

You can create a wrap note with the plan to sell the wrap to pay off the underlying if it's called, but if your buyer is not performing on the wrap, this tactic could blow up.

Then start researching the local market, look at rental rates, vacancy, neighborhoods, and what kinds of properties perform best.Finally, connect with a local real estate agent or other investors—they can show you deals, off-market properties, and help you understand what works in your area.

Late to the party but I find it is usually due to an angry applicant who got disqualified due to being low credit score, or some of the other red flags that indicate a low performing tenant. 

My role is more about helping clients track performance, analyze cash flow, and identify financial indicators that matter to their business.

Usually, noncompliance with a contract means the plaintiff will sue for “damages” not “specific performance” on the buy side (sell side “specific performance” is much easier to enforce).  

Even if the general trend is strong, a specific property may not perform as well, and vice versa.

Quote from @Andrew Syrios: I have never seen a bank call a Due on Sales Clause on a performing loan.