@Shai_Hulud Hi, thank you very much for posting on TP-Link Community. For testing purpose, could you please share with us the screenshots of your LACP settings on your Windows Server? You could refer...

@Slayer86 Hi, it seems that the 2.4G band Wi-Fi is defective on your Archer AX55 router, since it is a brand new one, please contact the seller where you bought it to get it replaced.

@ArtfulCodger Hi, thank you very much for posting on TP-Link Community. Please check if the write access is enabled, if not, enable it and test again.

@BigA1 Thanks for the update, glad to hear that you've solved the problem.

@RussianZA Hi, your current firmware is for MR600(ZA) V2, which cannot install EU version firmware. May I know if there is any problem with it now and who your ISP is?

@Craige_Davido Hi, may I know if your Huawei phone is always on 4G+ with the same EE SIM card at same location? and what is the band working on your phone? You could refer to How to check the 4G band...