uname output: OpenBSD zhangteng.my.domain 5.9 GENERIC.MP#1616 i386
hardware: Thinkpad T420(if necessary, i will show dmesg output)
tmux cofiguration: default(don't change anything)
problem description: I run the following command:
tmux
doas dd if=debian.iso of=/dev/rsd1c
and then, the output of status line: [1] 0:ksh*
about 15 minutes later, the output of status line:[1] 0:dd*
comment: any other programs are shown normally at the status line
Could you please tell me how to solve the problem ?

