Contradiction with Mark 3:10
Mark 3:10 elaborates that the crowd was pressing on Jesus to touch Him because of the healing, complementing rather than contradicting Mark 3:9.
Mark 3:10: For he had healed many; insomuch that they pressed upon him for to touch him, as many as had plagues. [pressed: or, rushed]
Contradiction with Matthew 14:23
While Mark 3:9 shows Jesus organizing a getaway by boat, Matthew 14:23 describes Him sending everyone away to pray alone, emphasizing solitude over preparation for crowds.
Matthew 14:23: And when he had sent the multitudes away, he went up into a mountain apart to pray: and when the evening was come, he was there alone.
Contradiction with John 6:15
Mark 3:9 suggests precognitive planning for crowd control, whereas John 6:15 presents a spontaneous departure alone into a mountain environment to evade crowds.
John 6:15: When Jesus therefore perceived that they would come and take him by force, to make him a king, he departed again into a mountain himself alone.