SQL Developer Tables Node is missing from when expand connection

Hi,
I'm getting this issue often when I expand the connection node (Oracle DB connection), the Tables node is missing from the object types tree. Even if i close the SQL developer and come back it would be the same.
Is this a known issue? I've seen this both in 3.0 & 3.1.
please advice.

Hi,
Just as an update: I did not encounter the issue anymore since my last post (ca 1 week) and I did not do any changes to sqldeveloper any more (never did an export / import of connections, no change in version of JDK any more etc.).
I guessed this here could be my issue: SQL Developer: Not able to view tables
excerpt: "The problem occurs when SQL Developer 3.0.04 connects to a limited privilege schema via a shared server connection. The workaround is to connect using a dedicated server connection."
I use type "Basic" for all my sqldeveloper connections, so no TNSnames.ora entries containing the line "SERVER=DEDICATED" and I did get same issue also when connection using a custom created user having the DBA role.
Therefore I guess this is here is more likely to be my issue: SQL Developer: Not able to view tables
excerpt "JDBC driver having to do with 'Out Of Band Breaks' - basically a low level TCP issue.
To enable the workaround, a Java system property needs to be set - oracle.net.disableOob=true. "
Very often when I did have the issue I closed SQLDeveloper and used Toad for the rest of the day (or a few hours). Next time launching SQLDeveloper the tables node usually was back again. So this could fit into the picture, right?

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