Hello, my name is Gaston, I am an independent consultant.
If when running applications that require internet services, the amount of data used is not displayed in the network column, it is possible that the Task Manager functions have been modified or have been damaged by third-party programs or viruses.
Perform a file check.
Open the CMD with administrator privileges and run the following commands:
sfc /scannow
dism.exe /online /cleanup-image /scanhealth
dism.exe /online /cleanup-image /restorehealth
dism.exe /online /cleanup-image /startcomponentcleanup
When finished, restart your system and see if it is resolved.
Best regards.