I have 4 index patterns with data from diferents sources, in the index pattern section of Kibana I can see the different fields of the indexes, but in discovery and TSVB the fields remain the same when I change the index pattern to visualize the data.
I have work with, 7.5, 7.6, and never have this problem.
I realize that Discovery and TSVB always show me the fields of the default index pattern (mixed with some fields of the other indexes), so I delete them all, recreated other index that wasnt the default, and still get the fields of the old default index pattern! fields that doesnt exist in the actual index.
now I have just one index pattern, I use this in the dev tools
and I get the mapping of the old default index, but I erase that index pattern, the mapping should not exists acording to this Documentation
you just need to delete the index to erase the mapping.....I dont know what is going on