2005 Subaru 2.5XT 5-speed manual - hesitation between 2nd & 3rd and 3rd & 4th gears

I have a 2005 Subaru 2.5XT 5-speed manual Outback wagon and just recently the car is hesitating between gears (2nd & 3rd and 3rd & 4th). Once I get the car into 4th to 5th gear the hesitation goes away. The car runs great on the highway, the turbo will kick-in just great. Can anyone give me any advice on what may be the problem with my Subaru?

Any orange Check Engine light’s illuminated during these episodes?