Sometimes (due to some bug) DBeaver UI hangs, freezes or works incorrectly. Usually it is impossible to find the reason of such problem without thread dump. Thread dump is the information about internal execution state of Java program. To get thread dump:

Mac and Linux

Run the following on your terminal:

jstack $(ps aux | grep -m1 dbeaver | awk '{print $2}') > thread-dump.txt

Windows

Just open task manager (CTRL+Escape), find DBeaver in the process list and copy process ID value. On Windows 8+ you need to switch to "Details" tab. Run

jstack <PID> > thead-dump.txt

in Command Prompt.

Now you can attach thread-dump.txt to the GitHub issue.