unwanted igmp

hi all can anyone explain me that why my router continuously broadcast to a multicast ip 224.0.0.22

172.27.15.169 is my wan ip on isp interface with a /24
10.50.0.65 is my lan interface ip
Screenshot_5.png

Because you probably enabled ospf or some other routing protocol on that interface and it is repeatedly announcing itself to its multicast group, on which there is no communication partner, so it keeps retrying…