It’s unclear to me what’s causing the issue. You said the /jp page doesn’t return, I am wondering if this might be a buffer overflow problem. If so, the most likely cause is the name of your second program, which is 12 characters long. My suggestion is to shorten that program name to 11 characters or less and see if the issue still exists.
Also, does this happen at regular intervals, like every 12 hours, or is it more random?