asus-ac5300 firmware Invalid instruction (UC_ERR_INSN_INVALID), arm little endian

*Describe the bug
When emulate asus-ac5300 firmware, Invalid instruction (UC_ERR_INSN_INVALID) occured,
firmware download link:
http://ftp.ufanet.ru/pub/firmware/Asus/RT-AC5300/RT-AC5300_3.0.0.4_380_7266-g6439257.trx

Sample Code

PROJECT_ROOT="/opt/firmwares/asus"
ql = Qiling([PROJECT_ROOT + "/usr/sbin/httpd"], PROJECT_ROOT, console=True, verbose=QL_VERBOSE.DEBUG)
ql.run()

Error
File "/home/test/PycharmProjects/Py3.8Emu/venv/lib/python3.8/site-packages/qiling/core.py", line 879, in emu_start
self.uc.emu_start(begin, end, timeout, count)
File "/home/test/PycharmProjects/Py3.8Emu/venv/lib/python3.8/site-packages/unicorn/unicorn.py", line 465, in emu_start
raise UcError(status)
unicorn.unicorn.UcError: Invalid instruction (UC_ERR_INSN_INVALID)

Additional context
file command output:
ELF 32-bit LSB executable, ARM, EABI5 version 1 (SYSV), dynamically linked, interpreter /lib/ld-uClibc.so.0, stripped

Start with the sample that launches /usr/sbin/httpd from the ASUS firmware and reproduce the failure. Trace the emulation path to qiling/core.py:879 and inspect the ARM little-endian setup and instruction that triggers UC_ERR_INSN_INVALID. Done means the sample emulates this firmware without the reported invalid-instruction error, with the cause and verification documented.