HI Guys,
I found this to be an issue too. Thank you for the posts. Fingers crossed this works for me too.
================
Sorry, just tried this option but still getting a serif font flick up first before Roboto. I have done an inspect on the text elements to see if there is an reference to a serif font but there isn’t. I hope to have a test site up this morning. I’ll send a link so that you can see for yourself. This is an intermittent issues – doesn’t always happen – usually when loading a page for the first time.