pgbouncer使用的交易模型中的查询错误

I use pgbouncer as pg connection pool,if I set pool_mode=Transaction in pgbouncer.ini,my app happens error when query db(app writed with go)：

(pq: bind message supplies 19 parameters, but prepared statement "" requires 20)
(pq: bind message supplies 22 parameters, but prepared statement "" requires 20
(pq: bind message supplies 22 parameters, but prepared statement "" requires 19)
(pq: bind message supplies 6 parameters, but prepared statement "" requires 22)

But I modify pool_mode=Session,It runs ok. what may be wrong if I set the pool_mode = Transaction .