Are the chances high of a reoccurant placenta abruption after having one at 32 weeks which resulted in stillbirth? Dr's have said it looked like a fluk

Recurrence rate. The most recent literature is putting recurrence rate between 5-15%. The risk is even higher if the initial abruption was considered to be severe. When the abruption is severe enough to kill the fetus, as in your case, there is a 7% incidence of the same outcome in a future pregnancy, unfortunately. There aren't any studies that demonstrate interventions lower the risk. I wish you the best. .
It is possible. Not common but in case more common than the public.