What did you do?

create a changefeed with no tables to sync

What did you expect to see?

changefeed resolved ts metrics works normally.

What did you see instead?

changefeed resolved ts metrics have no data.

Versions of the cluster

Upstream TiDB cluster version (execute SELECT tidb_version(); in a MySQL client):

(paste TiDB cluster version here)

Upstream TiKV version (execute tikv-server --version):

(paste TiKV version here)

TiCDC version (execute cdc version):

(paste TiCDC version here)