I have a mesh configuration with Archer AX58 + RE500X, both were bougth in the amazon.es in April 2025 and worked very well until the FW upgrade in the AX58 to the latest version 1.5.2 Build 20250812 rel.38324(4555).
The Internet goes down in Wi-Fi and cable LAN connections after 8 ~10hours of use, looks like an old issue came back in this FW version.

The only workaround possible is to switch OFF and ON the backside button, but the problem comes back after hours have passed.
Already did factory reset and re-config, and the issue continues.

I use that network to work from home, and it is very frustrating to have a video call or meeting where your internet is dropped and you need to go to the router and do a power cycle reboot several times a day.

Looks like the problem is already being fixed by TP-link, but I don´t know why still has not been delivered a new production official FW with the fix, as can be seen the issue was fixed for some users with FW beta version:

https://community.tp-link.com/en/home/forum/topic/842000?utm_source=chatgpt.com

Please, lets move on and fix that issue as soon as possible.