Umbraco.BlockList Incorrect Data?

[thientu995]

Which Umbraco version are you using? (Please write the exact version, example: 10.1.0)

10.3.2

Bug summary

Blocklist gets incorrect data when using Content Template?
It is repeating the previous data!

If I don't include the Element Type in the Content Template, this won't happen?

Specifics

1. I create 1 Document Type "Products" to display product list
2. I create 1 Document Type "Product" to display product details
3. I will create 1 Element Type "Content", It is used as a component for Product.
4. I create Content Template for "Product"
5. Back to the Content tab, I created 2 products with the newly created Content Template. I noticed that BlockList was repeating previous data due to

This won't happen if I don't add any Element Type in the Content Template's BlockList. Or, I delete and recreate the Element Type in the Content's BlockList

Steps to reproduce

Database: SQL Server or SQLLite.

Source:
Archive.zip

Account and Password: admin@localhost.com

Expected result / actual result

No response

[Zeegaan]

Thanks for the zip file, it made things much easier! Just jumping in here to say I could definitely reproduce this, and it seems its also an issue for the blockgrid editor here: #13413