Found those two lines on screen when init by docker-compose up
monstache | INFO 2020/01/17 19:07:23 Successfully connected to Elasticsearch version 7.5.0
elasticsearch0 | "stacktrace": ["org.elasticsearch.bootstrap.StartupException: java.lang.IllegalStateException: cannot downgrade a node from version [7.5.0] to version [7.2.0]",
Looks they fight with each other. Not sure why monstache connected to elastic 7.5.0 while 7.2.0 was used in docker-compose.yml. In short term, this could be solved by using 7.5.0 in docker-compose.yml. It could solve recently observed unsearchable issue in SearchBar.