FS#4040 - LinksysWRT32X - usb storage not recognized at boot

[openwrt-bot]

AP1010:

Booting freshly installed 21.02.0 (no customization) I get:
4.142247] usb usb2-port1: Cannot enable. Maybe the USB cable is bad?
[ 4.512230] usb 2-1: new high-speed USB device number 3 using xhci-hcd
When the system is fully up, the attached disk is not seen. If I unplug and re-plug it, the disk is recognized correctly.

When I boot 19.07.8 from the second partition of the same device (again, freshly installed, no customization), the disk is recognized at boot as expected.
[ 3.610086] scsi 2:0:0:0: Direct-Access External USB3.0 0204 PQ: 0 ANSI: 6
[ 3.618679] sd 2:0:0:0: [sda] 117231408 512-byte logical blocks: (60.0 GB/55.9 GiB)
[ 3.626590] sd 2:0:0:0: [sda] Write Protect is off