On the bedrock edition, the redstone signal is very noisy, it greatly interferes with the operation of redstone circuits. For example, the sticky piston on Java uses one stroke for impulse, so it can push the block away and not pick it up, but on the thigh, on the contrary, it constantly picks up due to confusion.
Related issues
Comments

Thank you for your report!
We're tracking this issue in MCPE-14851, so this ticket is being resolved and linked 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 to see if the issue has already been mentioned.
Quick Links:
📓 Bug Tracker Guidelines – 💬 Community Support – 📧 Mojang Support
📓 Project Summary – ✍️ Feedback and Suggestions – 📖 Game Wiki
-- I am a bot. This action was performed automatically! The ticket was resolved by one of our moderators, and I left this message to give more information to you.