I checked ver. 1.31.1. But it is not fixed. The post is the first question in my system. So, there are no tags in my system. Other inputs looks good. I checked the console in my chrome developper tool. It shows no error and warnings. I will try other debugging way. Thank you.
cf. not good tags
- over 13 characters
- just 13 characters
- with other tags ( ex. foo, var, buz )