Reminders on Ventura do not show iCal/Exchange ToDo items

I updated my Mac mini (M1) and MacBook Pro (Intel) to Ventura (13.1) earlier today.

An immediate problem is that iCal / Exchange reminders do not sync properly. (They appear to work fine on iOS/iPadOS, but not on the desktop or laptop)

It appears that Ventura is not synchronising correctly in both directions. Here is a list of anomalies that I have found:

1. The default Tasks list in Exchange and Google accounts does not show up on Ventura's Reminders app.
2. Creating new lists on Ventura for Exchange or Google show up on iOS/iPadOS but not on the opposite Ventura machine's app
3. Any changes made on iOS/iPadOS (new lists or items, and checking items as complete) reflect on other iOS/iPadOS devices, but not on either machines' Ventura apps

Hopefully Apple will correct this issue soon. I rely on Exchange and Gmail for work and I need a consolidated view of all reminders across these accounts and iCloud on a daily basis.

Has anyone else noticed thsi issue? Has anyone successfully worked around it? (I have tried force sync of calendars but this has no effect)