即使表中有数据，数据也不是来自数据库，ORM是Dapper

I am facing a strange issue, i am not sure what happened to code, it was working perfectly yesterday. I have data in table and am using below function to retrieve it from DB. i am using My SQL. when the application is started the data fetch correctly, but once we hit few times to DB for some tractions like save/update/delete. it stops to fetch records from DB or you can say it stops communicate with DB, but it the connection is building. i have verified that. I am facing a strange issue, i am not sure what