A bit to soon to cheer 
, it appeared again, hints on how to drill down to figure out why this is triggered appreciated!
Error: Request to Elasticsearch failed: {"error":{"root_cause":[{"type":"illegal_state_exception","reason":"No matching token for number_type [BIG_INTEGER]"}],"type":"search_phase_execution_exception","reason":"all shards failed","phase":"query_fetch","grouped":true,"failed_shards":[{"shard":0,"index":"popserv-2016.05.03","node":"lfWys2RkT9uuTCAz0lcmww","reason":{"type":"illegal_state_exception","reason":"No matching token for number_type [BIG_INTEGER]"}}]}}
KbnError@https:///bundles/commons.bundle.js?v=9889:61319:30
RequestFailure@https:///bundles/commons.bundle.js?v=9889:61352:19
https:///bundles/kibana.bundle.js?v=9889:89385:57
https:///bundles/commons.bundle.js?v=9889:63863:28
https:///bundles/commons.bundle.js?v=9889:63832:31
map@[native code]
map@https:///bundles/commons.bundle.js?v=9889:63831:34
callResponseHandlers@https:///bundles/kibana.bundle.js?v=9889:89357:26
https:///bundles/kibana.bundle.js?v=9889:88862:37
processQueue@https:///bundles/commons.bundle.js?v=9889:41836:31
https:///bundles/commons.bundle.js?v=9889:41852:40
$eval@https:///bundles/commons.bundle.js?v=9889:43080:29
$digest@https:///bundles/commons.bundle.js?v=9889:42891:37
$apply@https:///bundles/commons.bundle.js?v=9889:43188:32
done@https:///bundles/commons.bundle.js?v=9889:37637:54
completeRequest@https:///bundles/commons.bundle.js?v=9889:37835:16
requestLoaded@https:///bundles/commons.bundle.js?v=9889:37776:25