Thank you for the fix. I updated my Liquid Studio version in 18.0.13 and tested the fix.
The Format Rule with a pattern is saved after a Re-sync data source but not the property "Cast Type".
For example, I have a format rule Pattern [yyyy'-'MM'-'dd'T12:00:00+02:00'] and for the Cast type value "Date Time". After the "Re-sync", the format rule don't change (so it's ok), but the cast type became empty. The property value "DateTime" is not saved...
In advance, thank you for your answer.