Canonical alias doesn't show up in RoomSettings even though it's set

[ara4n]

@bmarty has this in his RoomSettings:

but in practice that room does have a canonical alias:

            {
              "content": {
                "alias": "#benoit1to1:matrix.org"
              },
              "event_id": "$153668066338483YfhcQ:matrix.org",
              "origin_server_ts": 1536680663655,
              "sender": "@ganfra:matrix.org",
              "state_key": "",
              "type": "m.room.canonical_alias",
              "unsigned": {
                "age": 75850200
              }
            },

...as well as m.room.aliases of:

            {
              "content": {
                "aliases": [
                  "#benoit1to1:matrix.org"
                ]
              },
              "event_id": "$15366806592116XDAGj:matrix.org",
              "origin_server_ts": 1536680659159,
              "sender": "@ganfra:matrix.org",
              "state_key": "matrix.org",
              "type": "m.room.aliases",
              "unsigned": {
                "age": 75854696
              }
            },

[bmarty]

I've got this:

                        {
                            "content": {
                                "alias": "#benoit1to1:matrix.org"
                            },
                            "event_id": "$153668066338483YfhcQ:matrix.org",
                            "origin_server_ts": 1536680663655,
                            "sender": "@ganfra:matrix.org",
                            "state_key": "",
                            "type": "m.room.canonical_alias",
                            "unsigned": {
                                "age": 68046714
                            }
                        },
                        {
                            "content": {},
                            "event_id": "$153668068038554UfIzT:matrix.org",
                            "origin_server_ts": 1536680680796,
                            "sender": "@ganfra:matrix.org",
                            "state_key": "",
                            "type": "m.room.canonical_alias",
                            "unsigned": {
                                "age": 68029573,
                                "prev_content": {
                                    "alias": "#benoit1to1:matrix.org"
                                },
                                "prev_sender": "@ganfra:matrix.org",
                                "replaces_state": "$153668066338483YfhcQ:matrix.org"
                            }
                        }

Looks like he second event erase the canonical alias

[ara4n]

right. the second event was in the timeline so i missed it. my bad