Easy to fix in the core dll, if ever gets modified, this is a 1 min fix.

on the class "PanelFeatureEffectsResource"

In the "if" a few lines above that enables: Gui.Localize("%PanelFeatureEffectsResourceTitle"), adding the text in bold fixes the issue.

if (Gui.GuiService.GetWindow<PlanetLabelsWindow_SystemManagement>(true).Visible || Gui.GuiService.GetWindow<CuriosityDiscoveredNotificationWindow>(true).Visible || Gui.GuiService.GetWindow<PlanetLabelsWindow_SystemOrbital>(true).Visible || flag)

Indeed it can not be corrected by mod override.

However, the effect of the deposit itself 

is correct as it affects the base FIDSI of a planet

Target property is correctly set (4 +2) 
Note : +2 and +2 as there is also another deposit on the planet i'am using as example

and multiplied by the population (7) leads to correct number (42)

Effect of system upgrade reciped also is correct.This limits the effects of this bug to UI misinformation only (fortunatly)