Issues with large files on S3 storage

[kuchtiak-ufal]

I have the following S3 storage configuration:

.env file:

S3_STORAGE=1
S3_ENABLED=true

local.cfg:

s3.download.direct.enabled = true
sync.storage.service.enabled = true
s3.upload.by.parts.enabled = true

create.file-preview.on-item-page-load = true

Uploaded large (3,7 GB)file.
I can see a progress bar in Upload file window, that says: it's now safe to close this page:

First issue: I closed this page, but I cannot see this file in Item view

After three or five minutes, after page refresh, suddenly I can see the new file available for download.

Second Issue: I cannot see the file preview, because of NPE described in #1313

I changed the store-number, in database, for this bitstream from 77 to 1.
And refreshed the Item View page.

Third issue: Now, I cannot see any files in item view - neither small files previously added to item.

[kuchtiak-ufal]

This is related to testing file-preview with S3 Storage:
#1271