A Practical issue in the operation of a grid-forming (GFM) inverter is the active-power reference-tracking capability regardless of grid frequency deviation, which can be effectively addressed using integral-proportional (IP) control, as it can effectively separate droop and damping characteristics. However, this paper shows that the IP control may lack in an essential functionality of GFM inverter, which is to provide sufficient active power in response to phase angle jump. Synchronous power control (SPC) inherently ensures this capability, though it introduces active-power tracking errors as a result of its inherent droop. To combine the advantages of both methods, this paper proposes an adaptive approach that integrates SPC with IP control. The proposed strategy ensures active-power tracking during normal operating conditions while enabling robust capability of active phase jump power provision. Experimental results validate the proposed control scheme.