Similar observation: sometimes when we get off the couch, on which we have a blanket made from artificial fibres, it causes our TV to go black for a couple of s

Similar observation: sometimes when we get off the couch, on which we have a blanket made from artificial fibres, it causes our TV to go black for a couple of seconds. The TV is wall mounted and a metre from the end of the couch, and about 3.5’ from where we’re sitting.