Late February and during March, so far, the 12MHz channel markers/beacons of Telecom Korea, in Seoul have been off air. This comes as their two 8MHz stations have gone off air and have not returned since September 2021.
It looks very much like they are in the process of phasing out their HF marine CW operations.
12.843.0MHz HLO
12.916.5MHz HLF
12.923.0MHz HLW2
12.935.0MHz HLG
Of note the 22.611.5MHz, once continuous transmission, is now intermittent and has had a call sign change from "HLF" to "HLG" for reasons unknown.