Aperture issue,at EOS M5 & EOS RP

[HopStepDynamic]

We are grateful to Japan for releasing these codes. And thank you for Google Translate. I attached this module to the "sigma 135-400mm f4.5-5.6 APO" and took a picture, but the behavior seems to be strange. I experimented with EOS M5 and EOS RP, but in both cases, the aperture does not return to full after shooting. Please tell me how to investigate and analyze the cause.

Thank you.