QNetworkInterface::allInterfaces() produces garbled (non human-readable) output for one device

The output of  qDebug() << QNetworkInterface::allInterfaces() produces a few lines, then truncates the output: 

QNetworkInterface::allInterfaces(): 
QList(
QNetworkInterface(name = "ethernet_32772", hardware address = "C8:5A:CF:30:D3:45", flags = CanBroadcast CanMulticast , entries = QList(address = QHostAddress("fe80::a8ef:f42b:4f01:7fd9%ethernet_32772"), netmask = QHostAddress("ffff:ffff:ffff:ffff::"), address = QHostAddress("169.254.70.56"), netmask = QHostAddress("255.255.0.0"), broadcast = QHostAddress("169.254.255.255"))), 
QNetworkInterface(name = "iftype53_32770", hardware address = "", flags = IsUp IsRunning CanBroadcast CanMulticast , entries = QList(address = QHostAddress("fe80::723e:7ca:789d:a5aa%iftype53_32770"), netmask = QHostAddress("ffff:ffff:ffff:ffff::"), address = QHostAddress("100.104.218.102"), netmask = QHostAddress("255.192.0.0"), broadcast = QHostAddress("100.127.255.255"))), 
{{QNetworkInterface(name = "iftype53_32768", hardware address = "00:FF:BB:BF:6E:C9", flags = IsUp IsRunning CanBroadcast CanMulticast , entries = QList(address = QHostAddress("f0 �A  }}

i.e. three binary characters, then output truncated.

However, the issue might lie with qDebug, because this code produces proper output: 

    for (const auto &networkDevice : QNetworkInterface::allInterfaces())
        qDebug() << networkDevice;

QNetworkInterface(name = "ethernet_32772", hardware address = "C8:5A:CF:30:D3:45", flags = CanBroadcast CanMulticast , entries = QList(address = QHostAddress("fe80::a8ef:f42b:4f01:7fd9%ethernet_32772"), netmask = QHostAddress("ffff:ffff:ffff:ffff::"), address = QHostAddress("169.254.70.56"), netmask = QHostAddress("255.255.0.0"), broadcast = QHostAddress("169.254.255.255")))
QNetworkInterface(name = "iftype53_32770", hardware address = "", flags = IsUp IsRunning CanBroadcast CanMulticast , entries = QList(address = QHostAddress("fe80::723e:7ca:789d:a5aa%iftype53_32770"), netmask = QHostAddress("ffff:ffff:ffff:ffff::"), address = QHostAddress("100.104.218.102"), netmask = QHostAddress("255.192.0.0"), broadcast = QHostAddress("100.127.255.255")))
QNetworkInterface(name = "iftype53_32768", hardware address = "00:FF:BB:BF:6E:C9", flags = IsUp IsRunning CanBroadcast CanMulticast , entries = QList(address = QHostAddress("fe80::a5ba:e271:6b37:803c%iftype53_32768"), netmask = QHostAddress("ffff:ffff:ffff:ffff::"), address = QHostAddress("10.100.0.2"), netmask = QHostAddress("255.255.0.0"), broadcast = QHostAddress("10.100.255.255")))

Line is not truncated, and qDebug() continues with the output.