Global Configuration -> Users -> Email Domains
A line does not appear in an empty list.
An additional line is displayed, disturbed by the operation. The error is only for IE + J! 3.9.0.

Joomla 3.9.0
IE 11.1.47
None
| Labels |
Added:
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| Status | New | ⇒ | Duplicate Report |
| Closed_Date | 0000-00-00 00:00:00 | ⇒ | 2018-11-03 20:01:00 |
| Closed_By | ⇒ | Quy | |
| Rel_Number | 0 | ⇒ | 22880 |
| Relation Type | ⇒ | Duplicate of |
| Status | Duplicate Report | ⇒ | Closed |
| Closed_By | Quy | ⇒ | joomla-cms-bot |
| Rel_Number | 22880 | ⇒ | 0 |
| Relation Type | Duplicate of | ⇒ |
Set to "closed" on behalf of @Quy by The JTracker Application at issues.joomla.org/joomla-cms/22933
Duplicate #22880.