Modal Popup and Custom subTitle erased

[textarea]

Preconditions (*)

1. Magento 2.3.3

Steps to reproduce (*)

1. Create a popup or custom modal with a title and subtitle, then change title with setTitle() method.

Expected result (*)

1. Subtitle still exists

Actual result (*)

1. Subtitle get erased

[m2-assistant]

Hi @textarea. Thank you for your report.
To help us process this issue please make sure that you provided the following information:

• Summary of the issue
• Information on your environment
• Steps to reproduce
• Expected and actual results

Please make sure that the issue is reproducible on the vanilla Magento instance following Steps to reproduce. To deploy vanilla Magento instance on our environment, please, add a comment to the issue:

@magento give me 2.4-develop instance - upcoming 2.4.x release

For more details, please, review the Magento Contributor Assistant documentation.

@textarea do you confirm that you were able to reproduce the issue on vanilla Magento instance following steps to reproduce?

• yes
• no

---

• Join Magento Community Engineering Slack and ask your questions in #github channel.

[magento-engcom-team]

✅ Confirmed by @sudheers-kensium
Thank you for verifying the issue. Based on the provided information internal tickets MC-29962 were created

Issue Available: @sudheers-kensium, You will be automatically unassigned. Contributors/Maintainers can claim this issue to continue. To reclaim and continue work, reassign the ticket to yourself.

[magento-engcom-team]

Hi @textarea. Thank you for your report.
The issue has been fixed in #26142 by @textarea in 2.4-develop branch
Related commit(s):

• 81b580accc3e0c48fb96f668be63680d9f055acd
• 75b6674a6dbaa6ddce5ca4d11e48e8f787210280
• 86023f9deea5be2dc3e846b4a3046fdaf5b9715f
• a1212509c813239ef8ab0236d623414831bbac12
• fcce5b8592f884bec431767d903150137a1a6c6e
• c4db9415c1567d1be897662593157f51b8b5f03b
• 435c3fe27964a15729ecbc2ebbafe04b34412faf

The fix will be available with the upcoming 2.4.0 release.