Seems there is a problem with. Internal case #158165 was created. For anyone who encounter the same problem, once the 11.48 hits the Internet, it should update automatically.
Internal case number 158165 is open to address the issue where the drop down menu in "WHM Home » Server Configuration » Update Preferences" allows users with LTS enabled to update to the EDGE tier when selecting 11.48. Please refrain from selecting version 11.48 for the time being if you are using a LTS build.
Yes, it's acceptable to utilize 11.48 as a LTS build at this time. Future updates will ensure that only even-number releases (e.g. 11.48 instead of 11.47) are utilized for LTS updates.