[Issue] Prevent flushing same tags several times

[m2-assistant]

This issue is automatically created based on existing pull request: #29885: Prevent flushing same tags several times

Preconditions (*)

1. Magento 2.4-develop

Description (*)

If a product is saved in admin - changed name, price, stock, weight, added category to product. Then after indexing, the same tags are flushed several times.
Here is an example of default Magento behaviour on cleaning cache tags during indexing (different arrays belong to different indexers cleaning the cache):

root@c119d6a06fcb:/var/www/m2clean$  bin/magento cron:run --group=index --bootstrap=standaloneProcessStarted=1

Array
(
)


Array
(
)


Array
(
    <0] => cat*p*1
    [1] => cat*c*2
    [2] => cat*c*1
    [3] => cat*c*2
    [4] => cat*c*3
    [5] => cat*c*1
)

Array
(
    [0] => cat*p*1
    [1] => cat*c*2
    [2] => cat*c*1
    [3] => cat*c*2
    [4] => cat*c*3
    [5] => cat*c*1
)


Array
(
    [0] => cat*p*1
    [1] => cat*c*2
    [2] => cat*c*1
    [3] => cat*c*2
    [4] => cat*c*3
    [5] => cat*c*1
)


Array
(
    [0] => cat*p*1
)

Array
(
    [0] => cat*p*1
    [1] => cat*p*1
    [2] => cat*p*1
    [3] => cat*p*1
    [4] => cat*c*2
    [5] => cat*c*1
    [6] => cat*c*2
    [7] => cat*c*3
    [8] => cat*c*1
)


Array
(
    [0] => cat*p*1
    [1] => cat*p*1
    [2] => cat*p*1
    [3] => cat*p*1
    [4] => cat*c*2
    [5] => cat*c*1
    [6] => cat*c*2
    [7] => cat*c*3
    [8] => cat*c*1
)

Array
(
    [0] => cat*p*1
    [1] => cat*p*1
    [2] => cat*p*1
    [3] => cat*p*1
    [4] => cat*p*1
    [5] => cat*c*2
    [6] => cat*c*1
    [7] => cat*c*2
    [8] => cat*c*3
    [9] => cat*c*1
)


Array
(
    [0] => cat*p*1
    [1] => cat*p*1
    [2] => cat*p*1
    [3] => cat*p*1
    [4] => cat*p*1
    [5] => cat*c*2
    [6] => cat*c*1
    [7] => cat*c*2
    [8] => cat*c*3
    [9] => cat*c*1
)

Array
(
    [0] => cat*p*1
    [1] => cat*p*1
    [2] => cat*p*1
    [3] => cat*p*1
    [4] => cat*p*1
    [5] => cat*p*1
    [6] => cat*c*2
    [7] => cat*c*1
    [8] => cat*c*2
    [9] => cat*c*3
    [10] => cat*c*1
)


Array
(
    [0] => cat*p*1
    [1] => cat*p*1
    [2] => cat*p*1
    [3] => cat*p*1
    [4] => cat*p*1
    [5] => cat*p*1
    [6] => cat*c*2
    [7] => cat*c*1
    [8] => cat*c*2
    [9] => cat*c*3
    [10] => cat*c*1
)


Array
(
    [0] => cat*p*1
    [1] => cat*p*1
    [2] => cat*p*1
    [3] => cat*p*1
    [4] => cat*p*1
    [5] => cat*p*1
    [6] => cat*c*2
    [7] => cat*c*1
    [8] => cat*c*2
    [9] => cat*c*3
    [10] => cat*c*1
)


Array
(
    [0] => cat*p*1
    [1] => cat*p*1
    [2] => cat*p*1
    [3] => cat*p*1
    [4] => cat*p*1
    [5] => cat*p*1
    [6] => cat*c*2
    [7] => cat*c*1
    [8] => cat*c*2
    [9] => cat*c*3
    [10] => cat*c*1
)


Array
(
    [0] => cat*p*1
    [1] => cat*p*1
    [2] => cat*p*1
    [3] => cat*p*1
    [4] => cat*p*1
    [5] => cat*p*1
    [6] => cat*c*2
    [7] => cat*c*1
    [8] => cat*c*2
    [9] => cat*c*3
    [10] => cat*c*1
)
{code}

Here is the same output with the changes applied:
{code}
root@c119d6a06fcb:/var/www/m2clean$  bin/magento cron:run --group=index --bootstrap=standaloneProcessStarted=1
Array
(
)


Array
(
)


Array
(
    [0] => cat*p*1
    [1] => cat*c*2
    [2] => cat*c*1
    [4] => cat*c*3
)

Array
(
    [0] => cat*p*1
    [1] => cat*c*2
    [2] => cat*c*1
    [4] => cat*c*3
)


Array
(
    [0] => cat*p*1
    [1] => cat*c*2
    [2] => cat*c*1
    [4] => cat*c*3
)


Array
(
    [0] => cat*p*1
)

Array
(
    [0] => cat*p*1
    [4] => cat*c*2
    [5] => cat*c*1
    [7] => cat*c*3
)


Array
(
    [0] => cat*p*1
    [4] => cat*c*2
    [5] => cat*c*1
    [7] => cat*c*3
)

Array
(
    [0] => cat*p*1
    [5] => cat*c*2
    [6] => cat*c*1
    [8] => cat*c*3
)


Array
(
    [0] => cat*p*1
    [5] => cat*c*2
    [6] => cat*c*1
    [8] => cat*c*3
)

Array
(
    [0] => cat*p*1
    [6] => cat*c*2
    [7] => cat*c*1
    [9] => cat*c*3
)

Array
(
    [0] => cat*p*1
    [6] => cat*c*2
    [7] => cat*c*1
    [9] => cat*c*3
)

Array
(
    [0] => cat*p*1
    [6] => cat*c*2
    [7] => cat*c*1
    [9] => cat*c*3
)

Array
(
    [0] => cat*p*1
    [6] => cat*c*2
    [7] => cat*c*1
    [9] => cat*c*3
)


Array
(
    [0] => cat*p*1
    [6] => cat*c*2
    [7] => cat*c*1
    [9> => cat*c*3
)

Steps to reproduce (*)

1. Go to System - Index Management
2. Select All Indexers_ and change the _Actions to Update by Schedule
3. Go to Catalog - Categories, and change the Category Name for at least two Categories, for example
4. Go to Catalog - Products and change the Price, Quantity, Weight for at least two Products
5. Run bin/magento cron:run --group=index --bootstrap=standaloneProcessStarted=1
6. Observe the return of \Magento\Framework\Indexer\CacheContext::getIdentities

Expected result (*)

Actual Result (*)