In the Java version, the light cube has different materials. When the player holds the light cube, they become visible. It can't be moved by the piston, and it can't be destroyed by the explosion and drop itself.
In the bedrock version, when the player holds the light cube, they don't become visible. It can be moved by a piston, or destroyed by an explosion and dropped.
Thank you for your report!
However, this issue is Invalid.
Please put only one bug report in each ticket. It is very difficult to keep track of bugs when they are not in their own tickets.
However, please review the Bug Tracker Guidelines before creating new reports. Be sure to search for an existing issue as it is likely to have already been reported.
Quick Links:
📓 Bug Tracker Guidelines – 📧 Mojang Support – 📓 Project Summary – ✍️ Feedback and Suggestions – 📖 Game Wiki