Can't alter data sense since upgrading to windows 10 phone preview, any way to set a limit?

[Fyoro]

It shows my data usage but set limit is grayed out and on settings for it just says Current data limit-None Specified and the set limit and restrict background data options are grayed out as well

 

[Harrie-S]

It shows my data usage but set limit is grayed out and on settings for it just says Current data limit-None Specified and the set limit and restrict background data options are grayed out as well

This is a know issue
•DataSense resets data use history on upgrade to Windows 10. No workaround: Will calculate correctly after the reset.
See below.
Here are the known issues and workarounds with the Windows 10 phone preview | Windows Central