I have a string collection (newCountries) that is being populated by a duallistbox flow screen element, and I am previously setting it to equal an empty string collection object.
The currentCountriesForThisRegion variable is a simple string.

As far as I can tell, in the above example, both are null, and the flow has said both criteria have been matched, but it is not executing the outcome - what am i missing?  Any and all ideas/workarounds much appreciated!  

I have a acreen flow called NewClientUser which gathers info from the logged in user in order to create a new contact and then activate that contact as a community user. Up until very recently, the whole thing was working fine, so I am wondering if this is caused by a critical update maybe? Anyway, that flow calls another flow called ComplyUserCommissioning which sets up the user, and it seems like the error is occurring somewhere in that flow.