mpu6050 not detected through i2c

I don't think the ENODOV error means a problem in the code :confused: (I'm using micropython btw)

I noticed something odd

>>> i2c.scan()
[81]
>>> i2c.scan()
[]
>>> i2c.scan()
[]
>>> i2c.scan()
[81, 82]
>>> i2c.scan()
[81]
>>> i2c.scan()
[]
>>> i2c.scan()
[]
>>> i2c.scan()
[]
>>> i2c.scan()
[]
>>> i2c.scan()
[]
>>> i2c.scan()
[81]
>>> i2c.scan()
[]
>>> i2c.scan()
[81]
>>> i2c.scan()
[]

When successively scanning, sometimes it sees nothing... Something's wrong here I guess?