Occasional "Please Enter Data Source ID" Message When Creating a Data Source

Wappler 2.7.0, Windows 10

Sometimes when I create a data source, immediately rename it and then click [Define Data Store Scheme] then I get the message shown below.

When it happens seems very random - maybe only one in 4/5 times.

If I click onto some other element and then go back to the [Define Data Store Scheme] then the message goes away!

Best wishes,
Antony.