When you middle-click on a deceased entity, you receive a spawn egg. The hitbox for grabbing the entity is as if it were still alive. However, utilizing the pickblock function on the deceased entity's body is only possible by aiming at its hitbox, not its body.
Linked issues
Attachments
Comments 2
Thank you for your report!
We're tracking this issue as MC-1246, so this ticket is being resolved and linked as a duplicate.
That ticket has already been resolved as Won't Fix, which means this is considered a bug but won't be fixed. The description of that ticket or the comments might explain the rationale. Please do not leave a comment on the linked ticket.
If you haven't already, you might like to make use of the search feature to see if the issue has already been mentioned.
Quick Links:
📓 Bug Tracker Guidelines – 💬 Community Support – 📧 Mojang Support (Technical Issues) – 📧 Microsoft Support (Account Issues)
📓 Project Summary – ✍️ Feedback and Suggestions – 📖 Game Wiki
Thats intended I guess.