Tickets : Customs fields content is lost when moving from one project to another

Tickets : Customs fields content is lost when moving from one project to another

When moving a ticket from one project (with custom fields) to another project without custom fields, the customs fields are not visible anymore. That is one issue, and it would be good to be able to keep those custom fields visible. 

But the worst is to come : if you then move back that ticket to the initial project it came from, then the content of the custom fields just disappeared ! you lose all the information ! That is a real bug !