If you have had the skills to write this comment, you have the skills to submit a bug report.

Rectangle has a simple bug report template, and maintainers would probably guide you if you'd have trouble providing the requested information.

  macOS version:
  Rectangle version:
  Logs if applicable (In Rectangle menu, hold option, "View Logging..."):

Maintainers are used to receiving barely understandable bug reports written in broken English or a foreign language by non-technical users, and the issue can usually be debugged if the users are willing to follow directions and respond to questions.