Busybox is corrupt error in Attended Sysupgrade build

I just tried out the Attended Sysupgrade on a newly installed OpenWRT 23.05.3 for the Linksys E8450. I had installed nano-full and the LuCI and CLI Attended Sysupgrade packages. Since I had downloaded the firmware just a couple days ago I was surprised that Attended Sysupgrade said there was an updated version. So I proceeded with the build and it errored out. Below is the output it produced.

Request data:

{
"url": "https://sysupgrade.openwrt.org",
"revision": "r23497-6637af95aa",
"advanced_mode": "0",
"sha256_unsigned": "",
"branch": "23.05",
"efi": null,
"request_hash": "8cd597730a9eb5f5b025a334592bef17",
"profile": "linksys,e8450-ubi",
"target": "mediatek/mt7622",
"version": "23.05.3",
"packages": [
"auc",
"base-files",
"busybox",
"ca-bundle",
"cgi-io",
"dnsmasq",
"dropbear",
"firewall4",
"fstools",
"fwtool",
"getrandom",
"hostapd-common",
"iw",
"iwinfo",
"jansson",
"jshn",
"jsonfilter",
"kernel",
"kmod-cfg80211",
"kmod-crypto-acompress",
"kmod-crypto-aead",
"kmod-crypto-ccm",
"kmod-crypto-cmac",
"kmod-crypto-crc32c",
"kmod-crypto-ctr",
"kmod-crypto-gcm",
"kmod-crypto-gf128",
"kmod-crypto-ghash",
"kmod-crypto-hash",
"kmod-crypto-hmac",
"kmod-crypto-manager",
"kmod-crypto-null",
"kmod-crypto-rng",
"kmod-crypto-seqiv",
"kmod-crypto-sha512",
"kmod-gpio-button-hotplug",
"kmod-hwmon-core",
"kmod-leds-gpio",
"kmod-lib-crc-ccitt",
"kmod-lib-crc32c",
"kmod-lib-lzo",
"kmod-mac80211",
"kmod-mt76-connac",
"kmod-mt76-core",
"kmod-mt7615-common",
"kmod-mt7615e",
"kmod-mt7622-firmware",
"kmod-mt7915-firmware",
"kmod-nf-conntrack",
"kmod-nf-conntrack6",
"kmod-nf-flow",
"kmod-nf-log",
"kmod-nf-log6",
"kmod-nf-nat",
"kmod-nf-reject",
"kmod-nf-reject6",
"kmod-nfnetlink",
"kmod-nft-core",
"kmod-nft-fib",
"kmod-nft-nat",
"kmod-nft-offload",
"kmod-ppp",
"kmod-pppoe",
"kmod-pppox",
"kmod-slhc",
"kmod-usb3",
"libblobmsg-json",
"libiwinfo",
"libiwinfo-data",
"libjson-c",
"libjson-script",
"liblucihttp",
"liblucihttp-ucode",
"libmbedtls",
"libmnl",
"libnftnl",
"libnl-tiny",
"libubox",
"libubus",
"libuci",
"libuclient",
"libucode",
"libustream-mbedtls",
"logd",
"luci",
"luci-app-attendedsysupgrade",
"luci-app-firewall",
"luci-app-opkg",
"luci-base",
"luci-light",
"luci-mod-admin-full",
"luci-mod-network",
"luci-mod-status",
"luci-mod-system",
"luci-proto-ipv6",
"luci-proto-ppp",
"luci-ssl",
"luci-theme-bootstrap",
"mtd",
"nano-full",
"netifd",
"nftables-json",
"odhcp6c",
"odhcpd-ipv6only",
"openwrt-keyring",
"opkg",
"ppp",
"ppp-mod-pppoe",
"procd",
"procd-seccomp",
"procd-ujail",
"px5g-mbedtls",
"rpcd",
"rpcd-mod-file",
"rpcd-mod-iwinfo",
"rpcd-mod-luci",
"rpcd-mod-rrdns",
"rpcd-mod-ucode",
"ubi-utils",
"uboot-envtools",
"ubox",
"ubus",
"ubusd",
"uci",
"uclient-fetch",
"ucode",
"ucode-mod-fs",
"ucode-mod-html",
"ucode-mod-math",
"ucode-mod-nl80211",
"ucode-mod-rtnl",
"ucode-mod-ubus",
"ucode-mod-uci",
"ucode-mod-uloop",
"uhttpd",
"uhttpd-mod-ubus",
"urandom-seed",
"urngd",
"usign",
"wireless-regdb",
"wpad-basic-mbedtls"
],
"diff_packages": true,
"filesystem": "squashfs",
"client": "luci/git-23.339.51123-138595a"
}

STDERR:

Generate local signing keys...
Generate local certificate...
Package list missing or not up-to-date, generating it.

Building package index...
Downloading https://downloads.openwrt.org/releases/23.05.3/targets/mediatek/mt7622/packages/Packages.gz
Updated list of available packages in /builder/build_dir/target-aarch64_cortex-a53_musl/root-mediatek/../../../../builder/dl/openwrt_core
Downloading https://downloads.openwrt.org/releases/23.05.3/targets/mediatek/mt7622/packages/Packages.sig
Signature check passed.
Downloading https://downloads.openwrt.org/releases/23.05.3/packages/aarch64_cortex-a53/base/Packages.gz
Updated list of available packages in /builder/build_dir/target-aarch64_cortex-a53_musl/root-mediatek/../../../../builder/dl/openwrt_base
Downloading https://downloads.openwrt.org/releases/23.05.3/packages/aarch64_cortex-a53/base/Packages.sig
Signature check passed.
Downloading https://downloads.openwrt.org/releases/23.05.3/packages/aarch64_cortex-a53/luci/Packages.gz
Updated list of available packages in /builder/build_dir/target-aarch64_cortex-a53_musl/root-mediatek/../../../../builder/dl/openwrt_luci
Downloading https://downloads.openwrt.org/releases/23.05.3/packages/aarch64_cortex-a53/luci/Packages.sig
Signature check passed.
Downloading https://downloads.openwrt.org/releases/23.05.3/packages/aarch64_cortex-a53/packages/Packages.gz
Updated list of available packages in /builder/build_dir/target-aarch64_cortex-a53_musl/root-mediatek/../../../../builder/dl/openwrt_packages
Downloading https://downloads.openwrt.org/releases/23.05.3/packages/aarch64_cortex-a53/packages/Packages.sig
Signature check passed.
Downloading https://downloads.openwrt.org/releases/23.05.3/packages/aarch64_cortex-a53/routing/Packages.gz
Updated list of available packages in /builder/build_dir/target-aarch64_cortex-a53_musl/root-mediatek/../../../../builder/dl/openwrt_routing
Downloading https://downloads.openwrt.org/releases/23.05.3/packages/aarch64_cortex-a53/routing/Packages.sig
Signature check passed.
Downloading https://downloads.openwrt.org/releases/23.05.3/packages/aarch64_cortex-a53/telephony/Packages.gz
Updated list of available packages in /builder/build_dir/target-aarch64_cortex-a53_musl/root-mediatek/../../../../builder/dl/openwrt_telephony
Downloading https://downloads.openwrt.org/releases/23.05.3/packages/aarch64_cortex-a53/telephony/Packages.sig
Signature check passed.
Downloading file:packages/Packages
Updated list of available packages in /builder/build_dir/target-aarch64_cortex-a53_musl/root-mediatek/../../../../builder/dl/imagebuilder
Downloading file:packages/Packages.sig
Signature check passed.
Collected errors:

• opkg_install_pkg: Checksum or size mismatch for package busybox. Either the opkg or the package index are corrupt. Try 'opkg update'.
• opkg_install_cmd: Cannot install package busybox.
• opkg_install_pkg: Checksum or size mismatch for package busybox. Either the opkg or the package index are corrupt. Try 'opkg update'.
• opkg_install_cmd: Cannot install package busybox.
  make[2]: *** [Makefile:189: package_install] Error 255
  make[1]: *** [Makefile:154: _call_manifest] Error 2
  make: *** [Makefile:274: manifest] Error 2

Start with the reported build output and the Makefile targets package_install, _call_manifest, and manifest named in the failure. Compare how the busybox package and package index are obtained and validated; done means the reported Attended Sysupgrade build completes without the checksum or size mismatch.