Blocks like dropper, dispenser, command_block do not trigger when they are placed in a redstone powered area.
MC-156919
Block doesn't get triggerd by redstone after you placed it
Resolved
Duplicate
0
Thank you for your report!
We're actually already tracking this issue in MC-51340, so I resolved and linked this ticket as a duplicate.
If you would like to add a vote and any extra information to the main ticket it would be appreciated.
If you haven't already, you might like to make use of the search feature in the future to see if the issue has already been reported.
Quick Links:
📓 Issue Guidelines – 💬 Community Support – 📧 Customer Support – 📖 Game Wiki