– I bought TP-Link Archer MR200 (as an LTE 4G Router) officially from my ISP (one of the biggest internet providers in Greece), in order to avoid incompatibility issues. (Previously, I had bought different routers from the market and faced compatibility issues.)
– Please consider the fact that I experience exactly the same problem/behavior with both the OS v2.3 controllers I have; I bought the 2nd several months later than the first, to be used only as a backup. Therefore, I believe that the chances to get rid of the problem by replacing the Ethernet module are very small.