I tried, but I wasn't able to do the following: "disable the Restricted background data setting for the Upwork for Freelancers app. On some Samsung devices, you may have to open Settings then select Battery to do so."
I couldn't find this setting anywhere, even using the search function to search my settings. I do have Upwork set to show notifications, and it's not in my list of apps that are put to sleep. I'm mystified because I haven't changed any settings. Nor has my phone updated recently. As far as I know, the app hasn't updated either.
Could you please provide more information about the phone you're using and the Android version instaled currently? I'd like to check with our team if they have any suggestions regarding this specific case.