connection seems dead after a long time

[panjunle]

my dbeaver version is v3.4.2.
i connect to a database and do some queries,then do some coding.
after about 10 mins,i go back to execute a query again,it just keep querying and can't get any results.
i remember this doesn't happen in v3.2.0 or in some early versions.
anyone know how to solve this problem.
thanks very much.looking forward to it.