Has anyone seen or can anyone help us to solve this strange error?

Apps10 UPD9.

We use Boomi to add Material Lines to a Shop Order and issue that material through the use of projections.

We have a scenario where we have successfully added 18 Materials (18 lines) of one material and issued them, but when trying to create the 19th Material line for this same material an unexpected server error occurs - it doesn’t even create the line so it can never issue it.  All subsequent attempts to add material lines to the Shop Order also fails.  The material in question is not a problem - there is enough qty in the correct location etc.

After the issue occurs we are able to use IEE to add more Material lines to the Shop Order without problem.  However if we then try to add a Material line in Aurena with Quantity 400 we get “Sorry there was an unexpected server error”.

In the Boomi logs this error manifests as “Error message received from Http Server, Code 500: Internal Server Error”

As a note, the 19th Material line that failed to create would have been the 25th Material line in the Shop Order, which happens to align with the 25 line count that the screen loads at any time in Aurena. Not sure if this means anything.

Is there a known bug in this area?  Is there a correlation with the 25th Material line?