problem has been resolved by tp-link support with latest beta firmware 1.2.12 Build 20260327 rel.40355(4555)

Apparently, TP-Link firmware is occasionally rolled out to individual devices before it is officially released.

@teero this is weird indeed, i can only assume that it has been revoked

thank you @Joseph-TP for asking, yes i have a support case open for this and engineers are working on this, so there is no reason to open up another case at the moment. meanwhile we found that these...

it appears, the problem also is visible on another linux system and the link down/up events happen at 10 minute intervals [Sa, 21. Feb 2026, 11:28:39] igb 0000:07:00.1 eno4: igb: eno4 NIC Link is...

same behaviour with different linux box attached to the lan port of the tl-wr1502x: # dmesg -T |grep eno4 [Sa, 21. Feb 2026, 11:25:03] igb 0000:07:00.1 eno4: igb: eno4 NIC Link is Up 1000 Mbps Full...