blocked caller is still show in the log technically, it's just sometimes it doesn't due to the phone app was too slow to pick up the call signal and callerx was too fast blocking it before the phone app even get the signal. This goes both way, in your case the callerx was too slow vs. phone app was too fast. That was the reason I try to keep the callerx as small as possible, so it can execute faster. The ring happens sometimes when your phone is under very heavy load. My suggestion is reboot the phone.