Multicalendar view for web browsers has stopped working?

The convenient ‘strip style’ multicalendar which shows multiple rooms with their bookings etc is now only showing gray boxes rather than the familiar green stripes with the guest name and payout.

Has anyone else seen this? I tried this on my Chrome and my Safari, on a MacBook Pro and iphone 12 and ipad mini 5; when I ‘uncheck’ 'price and rule-sets it then appears correctly.

Mine looks normal on google on macbook air right now, but I’ll keep an eye on it and let you know if it changes.