An interesting observation. Even more interesting that no one has reported it before:

I made a few test calls to the same number (the remainng credit check), then opened Call Recorder and deleted one from the list. I must add that the credit check calls were the only items on the list. The moment I deleted one, a big "No calls recorded yet" appeared in the middle of the screen, even though there were entries still on the list. Taping on one of them did not do anything. Neither did a long tap. Closing and re-opening Call Recorder fixed it.

EDIT: A bit more experimenting. The effect seems quite curious and difficult to describe accurately. An example - I have 2 calls on the list, make a 3rd one (with Call Recorder open) and - "No calls recorded yet" appears. I delete one - so that 2 remain - and the top remaing one reacts to the tap but the bottom one doesn't. Or vice-versa.