Beacon Duplication Glitch

I think this glitch has been around since 1 year ago (1.16.40) and is still working until the current version. This duplication glitch really interferes with the pure playing experience when playing in Realms because there are friends who use the duplication glitch from the beacon to duplicate their diamonds and netherite.
I hope this glitch is fixed in future versions soon.

Beacon duplication glitch can be seen in the following video:

1. https://youtu.be/tw_9DpElUGA
2. https://youtu.be/NvEQS20JxAY
3. https://youtu.be/8wkqVIXvPqs
4. https://youtu.be/LZS0Wvkj2Tg

(Sorry about the bad grammar because I use Google Translate)