I have about 8 kasa smart plugs from TPLINK (4x HS200 and 4x HS103). I notice them from time to time power off and back on within a second or so. Although annoying but tolerable that my house turns into a rave party every now and then for a split second, I do have some HS103's on my 3d printers that fail long prints because of this and that is just bad. Before there is any talk of power loss from the supply line, I do have very stable power and very rarely experience an outage.
My home security cameras picked it up. Here is a video of the lights going through their cycle. The lights on the top are on one smart switch while the lights on the bottom are on a separate one. Any idea what this could be? https://youtu.be/w52c-My8Uq4