You are using the feature Signature (Actions>Signature) with the app in online mode. It is currently working, but when you sync and go to offline mode you cannot see the option Signature.
SAP Hybris Cloud for Customer; SAP Hybris Cloud for Customer - Extended App
The feature Signature is currently not available for Sales Quote in offline mode.
This is the expected system behavior.
If you need to add signature in a sales quote in offline mode, you may contact your implementation manager to help with such request or approach directly the SAP Cloud Service Center.
You can find more details about the services offered by Cloud Service Center on https://www.sap.com/services/application-development.html. You can contact Cloud Service Center as follows:
a) If you are a partner: please use firstname.lastname@example.org or the Partnerfinder
b) If you are a customer: please use the little blue box “Contact Us” shown on the very right-hand side of https://www.sap.com/services/application-development.html, choose “Contact Us”, choose “Services”, choose “SAP Custom Development” and complete the page
Note: The services of the SAP Cloud Service Center will be charged as packaged services based on fixed prices.
An alternative option may be to check the SAP Hybris Cloud for Customer Influence Site to submit an idea: https://influence.sap.com/SAPCloudforCustomer
offline; signature; quote; , KBA , AP-RC-MOB-OFL-RT , Offline Runtime , Product Enhancement