Custom Formats not working

[Taras]

I'm configuring a custom format for a SQL datasource using Telerik (desktop) Report Designer v14.2.21.115.

I create the custom format for a date field as such

I click OK and when I preview the report I get an error "Input string was not in a correct format".  Looking at the custom format settings again, the value type changes back to numeric as below

Why does the Value Type change back to Numeric?

A similar issue occurs with CallTime when I format it as HH:mm

The property for the fields do contain the appropriate format values

[Taras]

This works correctly in 16.0.22.119 version.