This is fixed by a large(ish) patchset which went into 6.0:
https://lists.gnu.org/archive/html/qemu-devel/2021-04/msg01000.html Upstream commits: https://git.qemu.org/?p=qemu.git;a=commit;h=0db895361b8a82e1114372ff9f48 https://git.qemu.org/?p=qemu.git;a=commit;h=e392255766071c8cac480da3a9ae https://git.qemu.org/?p=qemu.git;a=commit;h=e5455b8c1c6170c788f3c0fd577c https://git.qemu.org/?p=qemu.git;a=commit;h=c5fef9112b15c4b5494791cdf8bb https://git.qemu.org/?p=qemu.git;a=commit;h=7b320a8e67a534925048cbabfa51 https://git.qemu.org/?p=qemu.git;a=commit;h=99545751734035b76bd372c4e721 https://git.qemu.org/?p=qemu.git;a=commit;h=fa7505c154d4d00ad89a747be2ed https://git.qemu.org/?p=qemu.git;a=commit;h=fbc6510e3379fa8f8370bf71198f https://git.qemu.org/?p=qemu.git;a=commit;h=0ebb5fd80589835153a0c2baa1b8 https://git.qemu.org/?p=qemu.git;a=commit;h=324c8809897c8c53ad05c3a7147d https://git.qemu.org/?p=qemu.git;a=commit;h=607206948cacda4a80be5b976dba
