Sky
The time limit applies to claimants reciving ESA(CB) in the WRAG, so if you are currently in the Support Group it will not apply.
After the 365 days, your ESA(CB) will cease, if you are eligible for ESA(IR) then your claim should be transferred, although you will have to provide additional information.
If you are not eligible for ESA(IR) you will continue to receive NI Credits towards a full State Pension
See
12 Month Limit for ESA(CB) Gordon