I am trying to get tables in a database. SqlMap tried this payload first:
UNION ALL SELECT ...CONCAT(0x71717a7171,JSON_ARRAYAGG(CONCAT_WS(0x78617366716d,table_schema,table_name)),0x716b7a7a71)... FROM INFORMATION_SCHEMA.TABLES WHERE table_schema IN (...)-- -

SqlMap received a JSON response from the site:
{...,"data":[...,["qqzqq[\"<table_schema>xasfq<table_name>\", \"<table_schema>xasfq<table_name>\", \"<table_schema>xasfq<table_name>\", \"<table_schema>xasfq<table_name>\", \"<table_schema>xasfq<table_name>\", \"<table_schema>xasfq<table_name>\", \"<table_schema>xasfq<table_name>\", \"<table_schema>xasfq<table_name>\", \"<table_schema>xasfq<table_name>\", \"<table_schema>xasfq<table_name>\", \"<table_schema>xasfq<table_name>\", \"<table_schema>xasfq<table_name>\", \"<table_schema>xasfq<table_name>\", \"<table_schema>xasfq<table_name>\", \"<table_schema>xasfq<table_name>\", \"<table_schema>xasfq<table_name>\", \"<table_schema>xasfq<table_name>\", \"<table_schema>xasfq<table_name>\", \"<table_schema>xasfq<table_name>\", \"<table_schema>xasfq<table_name>\", \"<table_schema>xasfq<table_name>\", \"<table_schema>xasfq<table_name>\", \"<table_schema>xasfq<table_name>\", \"<table_schema>xasfq<table_name>\", \"<table_schema>xasfq<table_name>\", \"<table_schema>xasfq<table_name>\", \"<table_schema>xasfq<table_name>\", \"<table_schema>xasfq<table_name>\", \"<table_schema>xasfq<table_name>\", \"<table_schema>xasfq<table_name>\", \"<table_schema>xasfq<table_name>\", \"<table_schema>xasfq<table_name>\"]qkzzq",...]]}

This answer contained all the required tables, but sqlmap for some reason used a next payload:
UNION ALL SELECT ...CONCAT(0x71717a7171,IFNULL(CAST(table_schema AS NCHAR),0x20),0x78617366716d,IFNULL(CAST(table_name AS NCHAR),0x20),0x716b7a7a71)... FROM INFORMATION_SCHEMA.TABLES WHERE table_schema IN (...)-- -

To this Sqlmap received a response:
{...,"data":[...,["qqzqq<table_schema>xasfqm<table_name>qkzzq",...]]}

As a result sqlmap showed only the table from the last payload.
It looks like it failed to parse the JSON to get the necessary tables from first response