After release of version 8.17 we found out that when sending invoices to Approval,
the invoice image was not shown, due to an error in the code relating to the invoice attachment
First attempt to fix the code was done on Tuesday evening 12th of November. This did not work as expected and a new fix was made, and deployed on Wednesday 13th of November.
This fix was successful, but still there were some issues left with showing the affected invoice images.
For this, first fix was made on Friday 15th, and last remaining fix was deployed on Tuesday 19th November.