freezery, Welcome to HonorBuddy! The symptoms you describe don't match my results and lack sufficient detail for me to research for you. A few quick pointers on posting:
1. When you your post is about Singular, be sure to post in the Singular thread [click here]
2. When you post in the Singular thread, always use the copy/paste the template provided [click here]
3. If you want your issue researched and fixed, there must be a debug log file attached to the post you created with the template.
thx ppl. seems that the problem comes from wow client. im using non-english client. when i switch back, problem solved. so weired . never happened before.