All Speakers cut out but only when playing simultaneously with sub and beam

All speakers cut out after about 1-5 minutes if playing simultaneously with sub and beam. I have three Sonos ones, a beam, a sub and one of the ikea speakers. I can play them all with no issues in any combination. However, if played with the beam and sub, the music cuts out. Ive tried every combo and it only happens with the beam and sub (and anything playing the same music at the same time). The beam and sub are typically connected to the TV but this issue only occurs while streaming music. The sub has an ethernet connection and the beam an HDMI. Everything else is wifi. 

When the speakers cut out, first the sub and the beam stop first after about 1-5 minutes, then any other speakers that are also playing with usually cut out with a 30 sec to minute delay.  Any help would be most appreciated because the system sounds so much better with the sub (but it always cuts out)!