Order response is slow

Stacks address:SP15ZKWWA03H5MZE4R2ZAQ8Y2JEMS4KCRSSV98XZ6
Descriptions:Order response is slow,it can’t get filled immediately but 20 seconds later.the experience is not good.
Screenshot:

Discord ID:motafxjokelaum#3490
Telegram ID: not used anymore

The order should be matched instantly, this may due to the order price is not matched?