[BUG] Can't see any field in Discover page: just the "_source" one

[q2dg]

Describe the bug

I've correctly filled an Opensearch index using the bulk API. In fact, this index has a timestamp field which is correctly recognized when creating the index pattern in Dashboards. But if I select this field as the time reference, in Discover page I just can see "_source" field below "Selected fields" section and none below "Available fields".

The thing is that if I don't select any field as time reference when creating the index pattern, then in Discover page appear all the fields correctly but, of course, I haven't any time reference as my timestamp field is only "one more field" like the others, so I can't get any visual representation.

I don't think it is a Dashboards bug....surely I'm doing something wrong but if so, there should be a way to get right things done in a easier manner...In summary: my index has all the fields inside _source field (including timestamp's one) but I can't access to them from Discover and I don't know why.

Thanks a lot

NOTE: I'm using last Dashboard docker image currently available

[q2dg]

I mean...why if I have stored documents like this in my OpenSearch server...

...I just get this screen in OpenSearch Dashboards after specifying an index pattern where "timestamp" field is choosen as the time reference?

Thanks!

[q2dg]

Just for reference...: https://discuss.opendistrocommunity.dev/t/cant-see-any-field-in-discover-page-just-the-source-one/8284/3?u=q2dg

[q2dg]

Well, as it can be read in above link, the error was having arbitrary timestamps too many far away from past or from future. It cause Dashboards not to show any field in "Available fields" in "Discover" page. This behaviour misleads because at first it seems an indexing problem, but I recognize it was my fault. Thanks anyway.