@James723 hey I resolved my issue with reinstalling the firmware via the web browser and not via the app

@avdstelt i had same issue, updated 3 x M5's to latest FW 1.5.1 and my internet on all devices came to a grinding halt. rebooted everything didn't help, ended up redownloading FW using web interface...

@heyyoumattyu keen to follow this thread or see if TP-Link have an answer. i have exact same issue, i have 3 M5 units in the house. updated to 1.5.1 build 20201022 and since then throughput speeds...