Discussion about same problem on Asus ROG Forum here
I have contected Asus Technical support and they told me, that nobody reported any issues with ASUS RT-AX57 Firmware version 3.0.0.4.386_53244
RT-AX55 firmware published on Asus site https://www.asus.com/supportonly/rt-ax55/helpdesk_bios?model2Name=RT-AX55
Firmwares for RT-AX55 and RT-AX57 are same, only difference is filename (for this release).