Aforementioned idle problem REPRODUCED ON SECOND MACHINE
The problem I reported here (thread closed - VERY annoying!) https://rog-forum.asus.com/t5/rog-flow-series/request-for-volunteers-investigating-intermittent-deep-idle/m-p/1111507#M657has now been reproduced on a second machine - an ASUS Zephyrus G15 ...