Update Custom Table on SAVE from different Tabs in FPM Risk assessment

Hi All,

I had a doubt in EHSM module where inside FPM Webdynpro screen from any standard tab when i press "SAVE" button all data are saved in their respective table. But when Custom tab is added to Standard Tabs, custom table is only populated only from custom tab not from other Standard Tabs. Attached is the screenshot for the same.

Here tab "Hazard Inventory" is custom and rest are Standard .

Is there any work around where i can also update Custom Table when i click "SAVE"    from any tab ??