Seeing the tape on the pipe and everything else my inspection would start under the bathroom floor to determine what else may be lurking out of sight for leaks and damaged structure. Then if it looks decent I would start t working the problem upstairs. Then at some point I might call my brother-in-law for his opinion. He will show up, get down on his knees to look more closely, show his incessant plumbers crack and ruin my entire day. Lol.