CKEditor numbered list property changes are not displayed correctly in the editor

Steps to reproduce:
1. Create a numbered list in the CMS -> CKEditor
2. Change numbered list properties type to "Lower Alpha", for example.
Expected results:
Numbered list is displayed as a,b,c
Actual results:
Numbered list is still displayed as 1,2,3
When going to the properties window of the numbered list again, the correct properties are shown. Also, when going to the actual page on the site, it is displayed correctly with letters instead of numbers.
This issue is reproducible with version 11.0.2 and version 11.1

ckeditor version is 4.5.11-h1