VBUS voltage wrong readins (readings higher than actual voltage)

[Cvijo]

When connecting vbus pin to high side supply, readings do not match multimeter readings (on multiple points)

I am constantly getting 13.41 volts from INA226, but the actual value is measured on multiple points 13.25 V

I am aware that your code is just reading INA data for VBUS values but i just can't figure out why it is so much difference.
Has anyone experienced the same behavior (i have tried 2 different modules and the problem is the same).

Thank you.