Power Bi v2.85.681.0 Breaking a Working Report - Direct Query PostgreSQL (Works in prev. version)

Update: Since posting this, Power BI updated to 2.85.963.0 but the error remains. When I state 'previous version' below (in reference to it working), I'm referring to the version prior to v2.85.681.0

I have a report that connects via direct query to a postgresql database via elephantsql.com The report has been working fine for the last 4 or 5 months (and it still works fine for users online right now).

However, I loaded the report today in Power BI desktop and I am presented with errors: 

The expression is already dead simple:

It's important to note that the report file loads fine on the previous version of Power BI desktop (my colleague is yet to update his software and can open the report fine without errors). 

If I remove the lowecase step and disable query folding, I am presented with the following error:

Any ideas what has changed in Power BI v2.85.681.0 to cause this error and how I might be able to address it? 

Thanks!