The strange situation - could not upload document (SPIP 2.1.12+)

Greeting,
during last time we often see the strange matter with SPIP ( we use
2.12, 2.13, 2.14)
we could not upload the document to article ( rubrique), but could add a logo.

- All permissions are correct (777 IMG, 777 IMG/*/)
- The setting is correct (allow document to article etc)
- If we uploading the file to /tmp/upload the SPIP doesn't see it
- no record in database ( spip_documents*) created
- Any logo uploading well

- if we copy the SPIP ( dump + squelettes + images) to another hosting
we are keeping the matter
- Upgrading 2.1.12->2.1.13->2.1.14 doesn't help

- if we upload a new SPIP install we could create an article and add
document to it, but when we
restore from dump.xml the matters appear again

We get this matters often ( 1 of 3 SPIP installation), and see the
matters at least at 3 different
hosting company ( our developing server + 2 big industrial hosting
where now normally works at least 40 other SPIP website).

Is any idea or solutions?

Thanks in advance,
Serge Markitanenko