One Deco has slow speeds
I am having a peculiar problem. I have one M4 connected to the main router via ethernet cable (Firmware version 1.4.3 Build 20200918 Rel 74289) and 3 satellite E4s (Firmware version 1.4.3 Build 20200918 Rel 44982). All the E4s are connected wirelessly to the main M4. Periodically, one of the E4s (always located at the same spot) gives slow speeds. The speeds are usually restored by rebooting or resetting and reconnecting. I have tried switching the E4s, but the slow speeds happen at the same location regardless of the unit. The signal source of that E4 is the main M4 deco. The signal source of the problematic E4 is the main M4 and the signal strength is good (connected on both 2.5 and 5 GHz bands). Please find below the floor plan: