Version 2.21.39

functional improvement

Entire Site
1. Improved the stability of saving process for operation logs.

Bug Fixes

Learning screen
1. Fixed a bug in which "Check Status/Study Rate" was not retained when opening a note with a check mark in the "X" button on the upper right corner of the screen and then returning to the [Course Details] screen after the check mark was placed.
Manage contents
1. Fixed a bug that the screen could not be scrolled while dragging contents.