Tightness and Tingling in late recovery

Approaching 11 months post-total knee replacement: Recovery has had ups and down. Walking 9,000 steps, able to climb stairs and jumping from 14" platform, but experiencing frequent periods of tightness and tingling that have lessened, but never disappeared. Doctor and physiotherapist keep telling me that it will "eventually" nerves and tissue will heal and it will disappear, but I rarely see anyone reporting these symptoms this late in recovery. Has anyone had similar experience?