The solution in my case was to replace:
dynamic o = System.Activator.CreateInstance(t);
with:
object o = System.Activator.CreateInstance(t);
dynamic d = o;
The memory leak no longer occurs having the workaround applied.
与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…