Possible conflict with I2S and saadc channel 0

[ms360]

Hi

I have a fully functional addressable LED driver interface using I2S + app_timer.
This code has been functional for a long time by itself.

I just added the SAADC example to read AIN4 and AIN5 with PPI and TIMER2 (tried TIMER3 as well).

Upon further digging, I noticed channel 0 was not cooperating. I changed my sampling to channels 1 and 2, and everything works. 
Is this a known issue or user error? 

[Elfving]

Hello,

What SoC and NCS version are you using?

Regards,

Elfving

[ms360]

I'm using nrf52840 and nRF SDK 17.1