since 5.8.4 (unsure about last digit):

when setting up a bond if kernel chooses a random mac
removing and readding the slave gets back to the used behaviour:

obs-arm-1:~ # modprobe bonding
3: enP2p1s0v1: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc mq state DOWN
group default qlen 1000
    link/ether 1c:1b:0d:60:ee:8b brd ff:ff:ff:ff:ff:ff
7: bond0: <BROADCAST,MULTICAST,MASTER> mtu 1500 qdisc noop state DOWN group
default qlen 1000
    link/ether 9e:29:55:da:aa:0e brd ff:ff:ff:ff:ff:ff
obs-arm-1:~ # echo +enP2p1s0v1 > /sys/class/net/bond0/bonding/slaves 
7: bond0: <BROADCAST,MULTICAST,MASTER> mtu 1500 qdisc noop state DOWN group
default qlen 1000
    link/ether 9e:29:55:da:aa:0e brd ff:ff:ff:ff:ff:ff
obs-arm-1:~ # echo -enP2p1s0v1 > /sys/class/net/bond0/bonding/slaves  
obs-arm-1:~ # echo +enP2p1s0v1 > /sys/class/net/bond0/bonding/slaves 
7: bond0: <BROADCAST,MULTICAST,MASTER> mtu 1500 qdisc noop state DOWN group
default qlen 1000
    link/ether 1c:1b:0d:60:ee:8b brd ff:ff:ff:ff:ff:ff