I have thousands of tables prefixed with TBL_
Suddenly i could not find one of my tables in the table node under the connections tab, but it was because SQL*developer is sorting my tables i a weird manner.
Found my table thousands tablenames further down the row and in a "wrong place", but it it initially made me confused.

the 4 tables TBL_AAR****** is for some reason not sorted correct.
regards Karsten