I think I found a problem: the data view of a table does not show data (columns and rows are missing) if the owner name of the table contains a '.'
create user "FirstN.LastN" identified by "test";
create table "FirstN.LastN".t1 as select 1 as id, "test" as c2 from dual;
Open Table Declaration - Data Tab
Columns and Rows and Data will be missing.
Thanks for reporting a 'bug' but IMHO it is not much of a problem or issue.
Also, for Oracle the CREATE TABLE statement you posted is invalid to begin with. Literals are specified using single quotes.
Best practices are to not use special characters (other than underscore) in object names and especially to not make those object names case sensitive by enclising them in double quotes.