Living systems are spectacular examples of spatiotemporally organized structures, and the motion of such entities features a multitude of novel and fascinating phenomena which are not attainable by the equilibrium counterpart [1, 2]. To understand the motion of active shapedeforming agents A collection of rings made of active Brownian particles (ABPs) [3, 4] for different packing fractions and activities is investigated using computer simulations. We show that active rings display a novel dynamic clustering [5] instead of the conventional motilityinduced phase separation (MIPS) [6] as observed in case of collection of ABPs. Surprisingly, increasing packing fraction of rings exhibits a non-monotonicity in the dynamics due to the formation of a large number of small clusters. The conformational fluctuations of the polymers suppress the usual MIPS exhibited by ABPs. This demonstrates a complex interplay between activity, topology, and connectivity.