Found the same problem:
1) The server does not receive the address. But provisioner writes "all servers provisioned".
<t: 0>, main.c, 247, ----- BLE Mesh Light Switch Client Demo -----
<t: 0>, mesh_softdevice_init.c, 112, Initializing SoftDevice...
<t: 0>, mesh_softdevice_init.c, 77, Enabling BLE...
<t: 2>, mesh_softdevice_init.c, 88, Ram base: 0x200032C8
<t: 627>, main.c, 220, Initializing and adding models
<t: 5524>, main.c, 275, Device UUID : 0059ABCDEFABCDEFACCDEFABCDEFABCD
<t: 2813240>, main.c, 98, Successfully provisioned
<t: 2813243>, main.c, 102, Node Address: 0x0100
<t: 0>, main.c, 219, ----- BLE Mesh Light Switch Proxy Server Demo -----
<t: 567>, main.c, 166, Initializing and adding models
<t: 31502>, main.c, 258, Device UUID : 0059FFFF00000000CE7FB60146F2E749
<t: 0>, main.c, 550, ----- BLE Mesh Light Switch Provisioner Demo -----
<t: 0>, mesh_softdevice_init.c, 112, Initializing SoftDevice...
<t: 0>, mesh_softdevice_init.c, 77, Enabling BLE...
<t: 2>, mesh_softdevice_init.c, 88, Ram base: 0x200032C8
<t: 573>, main.c, 488, Initializing and adding models
<t: 584>, main.c, 531, Setup defaults: Adding keys, addresses, and bindings
<t: 760>, provisioner_helper.c, 329, netkey_handle: 0
<t: 772>, main.c, 578, <start>
<t: 27243>, main.c, 117, Flash write complete
<t: 27246>, main.c, 565, Starting application ...
<t: 27248>, main.c, 567, Provisoned Nodes: 0, Configured Nodes: 0 Next Address: 0x0100
<t: 27252>, main.c, 568, Dev key : C3F9DC31849FB604BC298E870CE775B2
<t: 27255>, main.c, 569, Net key : 19B805BFCA49BA46EF120CCC2226CF6A
<t: 27258>, main.c, 570, App key : 67A61EEF48D1C518E8FECAABCE7E35EF
<t: 27261>, main.c, 571, Press Button 1 to start provisioning and configuration process.
<t: 374080>, main.c, 448, Button 1 pressed
<t: 374082>, main.c, 361, Waiting for Client node to be provisioned ...
<t: 378847>, provisioner_helper.c, 282, Scanning For Unprovisioned Devices
<t: 378854>, provisioner_helper.c, 144, UUID seen: 0059FFFF00000000CE7FB60146F2E749
<t: 386084>, provisioner_helper.c, 144, UUID seen: 0059ABCDEFABCDEFACCDEFABCDEFABCD
<t: 386087>, provisioner_helper.c, 95, UUID filter matched
<t: 387841>, provisioner_helper.c, 259, Provisioning link established
<t: 401168>, provisioner_helper.c, 254, Static authentication data provided
<t: 413691>, provisioner_helper.c, 192, Provisioning completed received
<t: 413694>, provisioner_helper.c, 197, Adding device address, and device keys
<t: 413699>, provisioner_helper.c, 214, Addr: 0x0100 addr_handle: 0 netkey_handle: 0 devkey_handle: 2
<t: 417161>, provisioner_helper.c, 155, Local provisioning link closed: prov_state: 2 remaining retries: 2
<t: 417166>, main.c, 282, Provisioning successful
<t: 417168>, provisioner_helper.c, 181, Provisioning complete. Node addr: 0x0100 elements: 5
<t: 417172>, node_setup.c, 672, Configuring Node: 0x0100
<t: 417175>, node_setup.c, 586, Config client setup: devkey_handle:2 addr_handle:0
<t: 417179>, node_setup.c, 361, Getting composition data
<t: 417219>, main.c, 117, Flash write complete
<t: 471127>, main.c, 332, Config client event
<t: 471129>, node_setup.c, 371, Adding appkey
<t: 473607>, main.c, 332, Config client event
<t: 473610>, node_setup.c, 272, opcode status field: 0
<t: 473612>, node_setup.c, 382, App key bind: Health server
<t: 474448>, main.c, 332, Config client event
<t: 474450>, node_setup.c, 272, opcode status field: 0
<t: 474453>, node_setup.c, 450, Setting publication address for the health server to 0x0001
<t: 478446>, main.c, 332, Config client event
<t: 478448>, node_setup.c, 272, opcode status field: 0
<t: 478450>, node_setup.c, 416, App key bind: Simple On/Off client on element 0x0101
<t: 479997>, main.c, 332, Config client event
<t: 479999>, node_setup.c, 272, opcode status field: 0
<t: 480002>, node_setup.c, 416, App key bind: Simple On/Off client on element 0x0102
<t: 480815>, main.c, 332, Config client event
<t: 480817>, node_setup.c, 272, opcode status field: 0
<t: 480820>, node_setup.c, 416, App key bind: Simple On/Off client on element 0x0103
<t: 481552>, main.c, 332, Config client event
<t: 481555>, node_setup.c, 272, opcode status field: 0
<t: 481557>, node_setup.c, 416, App key bind: Simple On/Off client on element 0x0104
<t: 482212>, main.c, 332, Config client event
<t: 482214>, node_setup.c, 272, opcode status field: 0
<t: 482217>, node_setup.c, 301, Set: on/off client: 0x0101 pub addr: 0x0105
<t: 485838>, main.c, 332, Config client event
<t: 485840>, node_setup.c, 272, opcode status field: 0
<t: 485843>, node_setup.c, 301, Set: on/off client: 0x0102 pub addr: 0x0106
<t: 489960>, main.c, 332, Config client event
<t: 489962>, node_setup.c, 272, opcode status field: 0
<t: 489964>, node_setup.c, 301, Set: on/off client: 0x0103 pub addr: 0xC003
<t: 494260>, main.c, 332, Config client event
<t: 494262>, node_setup.c, 272, opcode status field: 0
<t: 494265>, node_setup.c, 301, Set: on/off client: 0x0104 pub addr: 0xC002
<t: 498356>, main.c, 332, Config client event
<t: 498359>, node_setup.c, 272, opcode status field: 0
<t: 498361>, main.c, 248, Configuration of device 0 successful
<t: 498364>, main.c, 267, All servers provisioned
<t: 550848>, main.c, 117, Flash write complete
<t: 803876>, main.c, 311, Node 0x0100 alive with 0 active fault(s), RSSI: -30
<t: 1131562>, main.c, 311, Node 0x0100 alive with 0 active fault(s), RSSI: -29
<t: 1459591>, main.c, 311, Node 0x0100 alive with 0 active fault(s), RSSI: -30
2) Also regularly falls stack. We have to burn " s140_nrf52_6.0.0_softdevice.hex".
Most often, the stack falls for the client. For what reason?