Modules sort order in config.php is being inconsistent when no changes being made

[comdiler]

Preconditions

1. Install any Magento 2.*

Steps to reproduce

1. Run php bin/magento setup:upgrade
2. Run cp app/etc/config.php app/etc/config.php_t1
3. Run php bin/magento setup:upgrade again
4. Run cp app/etc/config.php app/etc/config.php_t2
5. Run diff app/etc/config.php_t1 app/etc/config.php_t2

Expected result

1. Files should be the same, because of no changes being made

Actual result

1. Files are different

[engcom-backlog-nickolas]

Hello @comdiler, thank you for your report.
We've acknowledged the issue and added to our backlog.

[adamzero1]

We had a similar issue, where the ordering of modules changing was causing us problems, this is the solution we came up with: https://github.com/zero1limited/magento2-PreserveModuleOrderingInProductionMode

[magento-engcom-team]

Hi @comdiler. Thank you for your report.
The issue has been fixed in #21020 by @ajardin in 2.3-develop branch
Related commit(s):

• 7b9c6058e8462165dd975ab9d005f671d29a5492
• 78916b3f987d47febbdf443b8839baca780e9c02

The fix will be available with the upcoming 2.3.2 release.