My Deco M4 system consistently spikes CPU usage to 100% even with very little bandwidth load. Every time this happens (10-15 times per minute) I temporarily lose wifi connectivity across my network. I

hi, the three units are placed on a straight line. 1(wired) --- 2 --- 3 but 3 connects to 1 instead of 2. this leads to a not-good-as-possible signal at unit 3. any ideas? thx in advance