Unable to turn on data cellular for my apps
Hello, i would like to ask if my problem is fixable. I would usually turn off my data cellular for certain applications as i want to conserve my data and over the past years i have no problem on turning it on & off. But recently i was unable to do so as when i have turn on data cellular for a certain application, it will turn off by itself. I have Turn on my mobile data, reset the network settings, restart my phone, and even allow the mobile data changes on screen time, (did all of them a few times) still no progress. Im using iphone 7. i have updated to the latest ios 13.3. ,1 weeks ago. Please help me solve this, it has been 4 days.