Unicode tags escaped when modifying a task

Hello.
I am using Taskwarrior and I think this is really good.
However, I faced one small bug when I am using tags with Korean characters. The symtom is that adding a tag is okay but while modifying tags the tag turns into an escaped string.

Step to reproduce
task add +구매 양말
task +LATEST modify due:eod
Then you will see

Tag '구매' deleted.
Due set to '2022-04-12 23:59:59'.
Tag '\uad6c\ub9e4' added.

This is problem because I cannot use the tag for a filter anymore.
I think this is a kind of unicode problem. but I cannot spot the cause of the error.

Thank you again.