Signals Notebook: Why "Limiting Moles/Solvent Ratio" value wasn't copied over to a new experiment?

See if Ratio and Volume are also empty in the Solvents table of your new experiment. Please ask your tenant administrator to check in the System Configuration -> Chemistry Settings -> Solvents Table if "Clear value when element is copy-pasted" checkboxes are ON for Ratio and Volume. If yes, try switching those OFF.