Can you fix your issue? I have same problem. Oracle BI Publisher 18.104.22.168.0.
I opened a Service Request. No solution yet.
The engineer sent a request to the developer group and have not heard back from the developer group for more than a month. I followed up. But I was told since the problem does not affect anything, I need to wait.
Could you open SR , too. So they know I'm not the only one who encounter the problem and they may pay more attention to it.