In Calcualtion view from the Projection the tables are missing.

Issue in the Calculation view

Created a new calculation view and having 2 to 3 projections and each projection have 2 tables. Linked well and activated also .

Up to here it is all fine.

After some time when we logoff and login back and when checked the calculation view the tables that are added previously are moved out from projections.

Our current version: 2.3.10

Can any one help on this.