In https://www.drupal.org/project/node_title_help_text/issues/3003863 → it was decided to use 'label' as config type for the text value of the node title help text to make the field translatable. This however has an extra limitation of a max length of 128 characters which is only checked when trying to save a translation of a content type.
1. Configure a node title help text of more then 128 characters on. (No error is shown)
2. Try to translate this content type (You don't even need to change the title help text)
3. On save an error will be shown that your help text exceeds the 128 character limit.
As node title help text is using a textarea I think an easy solution would be to change the configuration schema into a text type instead of a label type. This allows to store long textual values and translate those.
Fixed
1.0
Code
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Issue #3200909 by vbelle.kevin@gmail.com: Configuration schema only...
Automatically closed - issue fixed for 2 weeks with no activity.