Last year I got in touch with a professor by email. I was somewhat familiar with their topic, and very enthusiastic about working with them. I had a very positive exchange with them and did a call, after which they were willing to offer me a research internship. Their university is in the US, the field is computer science, and I am an undergrad studying outside the US.
The internship went well as far as I could tell. At the end, they offered to write me a recommendation letter (without me bringing it up), and we agreed to keep working remotely after I returned home. We had a very interesting discussion going on, even after the official internship ended, which got to the point where they asked me about my intentions for graduate school. By that time I was also finishing up the results of the work I did, in preparation for publishing it at a conference, which we had talked about when I was still in the US. It was to be my first publication.
Back at my university, I was asked to write a report of the work I did, because it was counted as the mandatory internship experience required to complete my undergraduate degree. I knew beforehand that I was to write a report, but took it as administrative overhead which nobody takes very seriously, and did not mention it to my internship supervisor until after the internship was over.
I sent them an email before writing the report, saying that I couldn't write anything very convincing about the work I did without at least mentioning some of the ideas we had discussed. I asked them about the level of detail they would be comfortable with me including in the report, given that we intended to publish. I also mentioned that the report would be used by my department (which is Electrical Engineering) only for evaluation purposes, and that it would not be read by anyone working in a field remotely close to the one we had worked on during the internship.
After that email, I did not hear back from my internship supervisor at all. Many months have passed now. I even sent them the results of the internship work, and multiple reminder emails.
Was it wrong to fail to mention that I had to write an evaluation report earlier? Or was it just unacceptable to write a report at all about unpublished research? Might they have felt that my email was not written in good faith and that I was trying to share their ideas with my department, which in reality hadn't the slightest idea of the topic I was working on?