Same here on an EX4200-VC (two members, one 48T, one 24T).
Commit random change, reboot didn't resolve the issue.
Feb 20 08:37:17 net-mer-srx-ds01 /kernel: rts_commit_proposalmput op: 2, peer_type:7, peer_index:1, vskid:0, seqno:63785, flag:2, Feb 20 08:37:17 net-mer-srx-ds01 /kernel: rts_commit_proposalmput op: 2, peer_type:23, peer_index:0, vskid:0, seqno:98517, flag:9, Feb 20 08:37:17 net-mer-srx-ds01 /kernel: rts_commit_proposalmput op: 2, peer_type:23, peer_index:1, vskid:0, seqno:98561, flag:10, Feb 20 08:37:17 net-mer-srx-ds01 /kernel: rts_commit_proposalmput op: 2, peer_type:25, peer_index:0, vskid:0, seqno:106184, flag:10, Feb 20 08:37:17 net-mer-srx-ds01 /kernel: rts_commit_proposalmput op: 2, peer_type:25, peer_index:1, vskid:0, seqno:105981, flag:10, Feb 20 08:37:17 net-mer-srx-ds01 /kernel: rts_commit_proposalmput op: 2, peer_type:7, peer_index:1, vskid:0, seqno:63786, flag:2, Feb 20 08:37:17 net-mer-srx-ds01 /kernel: rts_commit_proposalmput op: 2, peer_type:23, peer_index:1, vskid:0, seqno:98561, flag:9, Feb 20 08:37:17 net-mer-srx-ds01 /kernel: rts_commit_proposalmput op: 2, peer_type:25, peer_index:0, vskid:0, seqno:106184, flag:9, Feb 20 08:37:17 net-mer-srx-ds01 /kernel: rts_commit_proposalmput op: 2, peer_type:25, peer_index:1, vskid:0, seqno:105981, flag:9,