If I had to guess at your last q, it would be because they strongly centralised communication in No. 10 with extreme aggression, then No. 10 got put out of commission with the PM being seriously ill and Cummings out of commission until the last couple of days, so I suspect ministers are very conservative about communication at the moment and will remain so until either it gets more decentralised again or No. 10 is back at full strength.