LSP: Diagnostics get out of sync

During editing of JSON file the diagnostics become out of sync with the real state of the file. Happened before in other servers and files also.

	"diagnostics_delay_ms": 2000,
	"diagnostics_additional_delay_auto_complete_ms": 1000,

st4000-exploration (b1a1fa79a71d215dde2d6c396b559561feaeef5f).

::  -> LSP-json textDocument/didChange: {'textDocument': {'uri': 'file:///project/template/.lokalise.json', 'version': 6}, 'contentChanges': [{'text': '        "filter_langs": ["bg", "de", "en", "es", "fr", "it", "no", "pl", "pt", "pt_BR"],\n', 'range': {'end': {'character': 0, 'line': 7}, 'start': {'character': 0, 'line': 7}}, 'rangeLength': 0}]}
:: <-  LSP-json textDocument/publishDiagnostics: {'diagnostics': [{'message': 'Duplicate object key', 'source': 'json', 'code': 520, 'range': {'end': {'character': 22, 'line': 8}, 'start': {'character': 8, 'line': 8}}, 'severity': 2}, {'message': 'Duplicate object key', 'source': 'json', 'code': 520, 'range': {'end': {'character': 22, 'line': 7}, 'start': {'character': 8, 'line': 7}}, 'severity': 2}], 'uri': 'file:///project/template/.lokalise.json'}
::  -> LSP-json textDocument/didChange: {'textDocument': {'uri': 'file:///project/template/.lokalise.json', 'version': 7}, 'contentChanges': [{'text': '', 'range': {'end': {'character': 0, 'line': 9}, 'start': {'character': 0, 'line': 8}}, 'rangeLength': 86}]}
:: --> LSP-json textDocument/documentColor(10): {'textDocument': {'uri': 'file:///project/template/.lokalise.json'}}
:: <<< LSP-json 10: []
:: <-  LSP-json textDocument/publishDiagnostics: {'diagnostics': [], 'uri': 'file:///project/template/.lokalise.json'}

As clear from the log, the last state from the server reported no diagnostics but ST is still showing the one that was reported before that.