Bad packet count and OOS errors

I have a 16s2p configuration with 4.4 modules running at 9600 baud which is working fine, but one strange thing couldn’t be solved yet.
The packet received counter for bank 0 looks perfect, but bank 1 has issues for some reason as can be seen in the screenshot.
I tried swapping the modules around without any luck, it’s always module 29 that reads bad packets.
Even changing the cables didn’t help.
Does anyone have more ideas?