Before leaving the books at the OBCZ, I sat down to make release notes on my mobile. I entered the BCID into the main field expecting to be taken to the selected book's page, but instead I was channelled directly to the Make JE page.
On one hand, this makes total sense in order to facilitate easy journalling of found books. On the other hand, as there are no links to other options (edit book details | make release notes | update cover) nor are the title or image clickable to take one through to the selected book's page, it means one has to then go to the book search page, make extra taps to enter as many details about the book as possible in order to not get the timeout error for the search, click through from the results page to the book's page, tap on make release notes, and only then can you make the release note. This takes time, eats up data, and, most importantly for me, it drains the battery.
After the first book is released, the rest are a breeze thanks to the "release to the same location" feature, but that first one... It took me around 10 minutes, and I'm not a newbie on the website.
Edit to add:
Book Search by BCID was my first stop after the main field, as that does offer an option to release the book as well as to view the book's page, but those options did not work for me, only the New JE option worked, and with quite a bit of delay.