I2c1 bus failed in 3 Nano SOMs

,

Hi,
we have 1500 SOMs deployed in the field
3-4 nos have failed,…

3 SOMs failed on site, on further observation, all systems are working except I2C1.
I2C1 port voltage level seems to be wrong on these SOMs, please find the screen shot of Oscilloscope below, yellow SCL and green SDA.

is it a known issue or a random failure?

Hi, have you done cross check? You can test these modules on devkit carrier board to see if issue is still, so that to confirm it is module issue or your custom carrier board issue.