I try to set up my HA with new Matter (matter-js Server) using WiFi and Thread.
I have a problem with pairing devices with WiFi and also with Thread. Connecting my bulb using the companion app works until it states that it tries to test connection with the Thread network. In the same moment the bulb turns blue indicating that connection is made and it tries to set up with the Thread network.
After a minute (or so) the pairing fails with a message stating on the app that it cant reach the device (which one?) and asking if my Wifi is on. But this is a Thread bulb and the mobile is conencted to the Wifi.
Looking in the log file of the matter-js server I see some error messages:
2026-07-13T19:20:17.100739124+02:00 stdout F 2026-07-13 19:20:17.100 INFO ConfigStorage Set config key nextNodeId to 13
2026-07-13T19:20:17.232595119+02:00 stdout F 2026-07-13 19:20:17.231 INFO CommissioningClient Operational address for undefined set to udp://192.168.44.113:5540
2026-07-13T19:20:17.234349727+02:00 stdout F 2026-07-13 19:20:17.233 INFO Endpoint server-1-fff1.peer1 ready endpoint#: 0 type: RootNode (0x16) behaviors: đź’¤parts âś“index âś“commissioning âś“network
2026-07-13T19:20:17.247056316+02:00 stdout F 2026-07-13 19:20:17.246 INFO Controller~missioner Establish PASE to device
2026-07-13T19:20:32.371463996+02:00 stdout F 2026-07-13 19:20:32.370 INFO Session •unsecured#4666287a450467ed Session ended
2026-07-13T19:20:32.373336399+02:00 stderr F 2026-07-13 19:20:32.372 WARN Commission~onnection Address udp://192.168.44.113:5540 unreachable for known-address-0-udp://192.168.44.113:5540
2026-07-13T19:20:32.472079124+02:00 stderr F 2026-07-13 19:20:32.377 ERROR WebSocketC~erHandler [1] WebSocket error response (commission_on_network) a2d5d4b9932d47379f2ba71c6836aff2 Commission failed: Could not connect to device
2026-07-13T19:20:32.472079124+02:00 stderr F at ServerError.nodeCommissionFailed (/app/node_modules/@matter-server/ws-controller/src/types/WebSocketMessageTypes.ts:104:16)
2026-07-13T19:20:32.472079124+02:00 stderr F at ControllerCommandHandler.commissionNode (/app/node_modules/@matter-server/ws-controller/src/controller/ControllerCommandHandler.ts:1192:31)
2026-07-13T19:20:32.472079124+02:00 stderr F at async WebSocketControllerHandler.#commissionWithRetry (/app/node_modules/@matter-server/ws-controller/src/server/WebSocketControllerHandler.ts:921:47)
2026-07-13T19:20:32.472079124+02:00 stderr F at async WebSocketControllerHandler.#handleCommissionOnNetwork (/app/node_modules/@matter-server/ws-controller/src/server/WebSocketControllerHandler.ts:1031:24)
2026-07-13T19:20:32.472079124+02:00 stderr F at async WebSocketControllerHandler.#handleWebSocketRequest (/app/node_modules/@matter-server/ws-controller/src/server/WebSocketControllerHandler.ts:655:30)
2026-07-13T19:20:32.472079124+02:00 stderr F Caused by: [peer-communication] Could not connect to device
2026-07-13T19:20:32.472079124+02:00 stderr F at ControllerCommissioner.#establishPaseFromCandidates (/app/node_modules/@matter/protocol/src/peer/ControllerCommissioner.ts:322:23)
2026-07-13T19:20:32.472079124+02:00 stderr F at async ControllerCommissioner.commission (/app/node_modules/@matter/protocol/src/peer/ControllerCommissioner.ts:232:29)
2026-07-13T19:20:32.472079124+02:00 stderr F at async CommissioningClient.commission (/app/node_modules/@matter/node/src/behavior/system/commissioning/CommissioningClient.ts:275:52)
2026-07-13T19:20:32.472079124+02:00 stderr F at async ClientNode.commission (/app/node_modules/@matter/node/src/node/ClientNode.ts:135:9)
2026-07-13T19:20:32.472079124+02:00 stderr F at async MatterController.commission (/app/node_modules/@project-chip/matter.js/src/MatterController.ts:532:13)
2026-07-13T19:20:32.472079124+02:00 stderr F at async CommissioningController.commissionNode (/app/node_modules/@project-chip/matter.js/src/CommissioningController.ts:467:24)
2026-07-13T19:20:32.472079124+02:00 stderr F at async ControllerCommandHandler.commissionNode (/app/node_modules/@matter-server/ws-controller/src/controller/ControllerCommandHandler.ts:1186:22)
2026-07-13T19:20:32.472079124+02:00 stderr F at async WebSocketControllerHandler.#commissionWithRetry (/app/node_modules/@matter-server/ws-controller/src/server/WebSocketControllerHandler.ts:921:47)
2026-07-13T19:20:32.472079124+02:00 stderr F (see parent frames)
2026-07-13T20:11:27.321729803+02:00 stdout F 2026-07-13 20:11:27.320 INFO BorderRouterRegistry BR instance dropped (no valid xa) qname="OpenThread BorderRouter #6790._meshcop._udp.local" source=meshcop xa=missing nn="" vn=""
I wonder what the device 192.168.44.113 is. I know 5540 is Matter operational port. But none of the devices I know has a 192.168.44.113 so I assumes it is the bulb?
I thought the pairing goes through Bluetooth and Thread. And Thread is Ipv6?
So where is this Ipv4 coming from? And why might I have connection problems? The listing in my router names the entry as espressif as name.
Question: What might be wrong, where do I need to look?