I also get the timeout on the receipts a lot of the time, so much so that I have now given up. But taking a picture on the phone wouldn’t have helped in this case, apart from having a record of the bike number. As far as I was concerned, I docked the bike and on doing my physical check making sure it didn’t come out again, it was docked. But apparently not in this case.
Today I saw the green light and gave the pull check, fingers crossed tonight.