Cannot scan wifi and bluetooth at the same time

[t-walker-wei]

Device: Raspberry pi 4B with USB bluetooth adapter
When enable scan bluetooth with "-bluetooth" the debug info only show bluetooth info.

2021-11-02 10:53:42 [INFO] main.go func1:214 scanning bluetooth
2021-11-02 10:53:42 [INFO] main.go func1:218 scanning for 5 seconds
2021-11-02 10:53:42 [DEBUG] bluetooth.go scanBluetooth:38 scanning bluetooth
2021-11-02 10:53:47 [DEBUG] bluetooth.go scanBluetooth:61 bluetooth scan finished
2021-11-02 10:53:47 [DEBUG] main.go basicCapture:369 {
"t": 1635821622435,
"f": "walker",
"d": "rpi",
"l": "livingroom",
"s": {
"bluetooth": {
"0f:92:46:83:c6:5d": -67,
"7b:a8:06:a5:63:06": -87,
"fa:7a:a7:ea:31:05": -82
}
},
"gps": {}
}

If without "-bluetooth" I get:

2021-11-02 10:37:59 [INFO] main.go func1:211 scanning with wlan0
2021-11-02 10:38:00 [DEBUG] main.go basicCapture:369 {
"t": 1635820679441,
"f": "walker",
"d": "rpi",
"l": "livingroom",
"s": {
"wifi": {
"04:d9:f5:53:0f:c8": -32,
"04:d9:f5:53:0f:cc": -35,
"30:fc:68:bd:b5:55": -74,
"60:aa:ef:c0:e0:ec": -75,
"60:aa:ef:c0:e0:f1": -76,
"70:3a:73:06:0a:80": -66
}
},
"gps": {}
}
How can I scan both wifi and bluetooth?