Multiselect attribute, not all options are saved in database.

[jakwinkler]

Preconditions (*)

1. Magento 2.4.2,
2. Magento 2.4.1,
3. Magento 2.4.2-p1,
4. Magento 2.3.x

Steps to reproduce (*)

1. Create a new multiselect attribute
2. Add at least 150 options to an attribute
3. Add an attribute to main attribute set
4. create a product and assign ALL options to the product

Expected result (*)

1. All options are selected (as they are not saved) in catalog_product_entity_text table as in Magento 1 (or propose a different solution)

Actual result (*)

1. Attribute options are saved in catalog_produdct_entity_varchar table
2. not all options are saved when you reopen the product in Admin

This is basically a copy of this issue:
#24199

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• Severity: S0 - Affects critical data or functionality and leaves users without workaround.
• Severity: S1 - Affects critical data or functionality and forces users to employ a workaround.
• Severity: S2 - Affects non-critical data or functionality and forces users to employ a workaround.
• Severity: S3 - Affects non-critical data or functionality and does not force users to employ a workaround.
• Severity: S4 - Affects aesthetics, professional look and feel, “quality” or “usability”.

[m2-assistant]

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[jakwinkler]

You can cleary see the issue if you look in the database, value limit is 255 characters in catalog_product_entity_varchar

[m2-assistant]

Hi @engcom-Echo. Thank you for working on this issue.
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[jakwinkler]

Since this is a critical issue, it affects the entire framework functionality for products with multi select attributes and it got NONE attention from M2 CORE TEAM, I'm closing this issue and related Pull Request.