Could not able to create index-pattern in 7.12.0

Index pattern is not getting saved in kibana in 7.12.0

{
"_index" : ".kibana",
"_type" : "_doc",
"_id" : "index-pattern:9ad343c0-9150-11eb-90fa-73fc238e10c4",
"_score" : 1.0,
"_source" : {
"index-pattern" : {
"fieldAttrs" : "{}",
"title" : "loadtest",
"timeFieldName" : "@timestamp",
"fields" : ""
},
"type" : "index-pattern",
"references" : ,
"migrationVersion" : {
"index-pattern" : "7.11.0"
},
"updated_at" : "2021-03-30T12:08:14.598Z"
}
},
{
"_index" : ".kibana",
"_type" : "_doc",
"_id" : "index-pattern:71568980-9150-11eb-90fa-73fc238e10c4",
"_score" : 1.0,
"_source" : {
"index-pattern" : {
"fieldAttrs" : "{}",
"title" : "loadtest",
"timeFieldName" : "@timestamp",
"fields" : ""
},
"type" : "index-pattern",
"references" : ,
"migrationVersion" : {
"index-pattern" : "7.11.0"
},
"updated_at" : "2021-03-30T12:07:04.994Z"
}
},
{
"_index" : ".kibana",
"_type" : "_doc",
"_id" : "index-pattern:c0853a60-9150-11eb-90fa-73fc238e10c4",
"_score" : 1.0,
"_source" : {
"index-pattern" : {
"fieldAttrs" : "{}",
"title" : "loadtest*",
"timeFieldName" : "@timestamp",
"fields" : ""
},
"type" : "index-pattern",
"references" : ,
"migrationVersion" : {
"index-pattern" : "7.11.0"
},
"updated_at" : "2021-03-30T12:09:17.839Z"
}
},
{
"_index" : ".kibana",
"_type" : "_doc",
"_id" : "index-pattern:2a500d80-9151-11eb-90fa-73fc238e10c4",
"_score" : 1.0,
"_source" : {
"index-pattern" : {
"fieldAttrs" : "{}",
"title" : "loadtest",
"timeFieldName" : "@timestamp",
"fields" : ""
},
"type" : "index-pattern",
"references" : ,
"migrationVersion" : {
"index-pattern" : "7.11.0"
},
"updated_at" : "2021-03-30T12:12:15.333Z"
}
},

After deleting kibana pod. In new kibana i was able to see all index pattern (nearly 10 patterns with same name.)