Datawindow Editmask DD Calendar

Greetings to all !

We've recently migrated an application, PFC based (PFC 8 - migrated and migrated over and again), from PB claasic to PB.NET. The PB version is 12.5.2. Build 5583.

This application is having Datawindow Editmask DD Calendar. In PB classic, this DD calendar opens fine.

But in PB.NET, on clicking, this calendar opens and closes immediately.

Did anyone faced simialr issue or know how to oversome this issue?

Thanks...

Mazibar