Hello, bro,
wish you can consider my solution.
I think your issue is that ESpacce IVS client display decoder exceeds the maximum decoder capability when pushed on the video wall using the decoder.
1. I think you need to check the settings first. because Decoder has it`s own capacity.
it can not support 1080P with 16 panels. try to change the resolution into 720P.
2. if still issues, please contact Huawei support.