“perf script -F +insn” doesn't print insn field

[QingYuDanYan]

After collecting perf data using perf record, I use perf script -i perf.data -F +insn to get the collected data. But there is nothing in the insn field.

        perf 32224 15889777.194652:          1 cycles:ppp:  ffffffff8826e448 native_write_msr ([kernel.kallsyms]) insn:
        perf 32224 15889777.194654:          1 cycles:ppp:  ffffffff8826e448 native_write_msr ([kernel.kallsyms]) insn:
        perf 32224 15889777.194655:         11 cycles:ppp:  ffffffff8826e448 native_write_msr ([kernel.kallsyms]) insn:
        perf 32224 15889777.194657:        285 cycles:ppp:  ffffffff8826e44a native_write_msr ([kernel.kallsyms]) insn:
        perf 32224 15889777.194658:       7550 cycles:ppp:  ffffffff88237a58 native_sched_clock ([kernel.kallsyms]) insn:
          sh 32224 15889777.194660:     191221 cycles:ppp:  ffffffff886219bd apparmor_bprm_committing_creds ([kernel.kallsyms]) insn:
          sh 32224 15889777.194707:    2700450 cycles:ppp:      7fc66bd036d7 [unknown] (/lib/x86_64-linux-gnu/ld-2.27.so) insn:
          sh 32225 15889777.195051:          1 cycles:ppp:  ffffffff8826e448 native_write_msr ([kernel.kallsyms]) insn:
          sh 32225 15889777.195054:          1 cycles:ppp:  ffffffff8826e448 native_write_msr ([kernel.kallsyms]) insn:
          sh 32225 15889777.195055:         13 cycles:ppp:  ffffffff8826e448 native_write_msr ([kernel.kallsyms]) insn:
          sh 32225 15889777.195056:        302 cycles:ppp:  ffffffff8826e44a native_write_msr ([kernel.kallsyms]) insn:
          sh 32225 15889777.195057:       7713 cycles:ppp:  ffffffff88237a58 native_sched_clock ([kernel.kallsyms]) insn:
          sh 32225 15889777.195060:     192158 cycles:ppp:  ffffffff88418cdb __handle_mm_fault ([kernel.kallsyms]) insn:
          sh 32225 15889777.195119:    2580729 cycles:ppp:  ffffffff88ba9d97 clear_page_erms ([kernel.kallsyms]) insn:

Is it a bug or just because I use it in wrong way?