SC is freezing with some SQLite data

Hi, I have SC v.9 running on MacOSX Mojave. Installed version.

Several times, in different browsers, the app is freezing and restarting the browser is not helping.

I re-run 127.0.0.1:8090 in another browser, disconnect from previous browser’s session with SC alert. It works again.

After a while, I stuck in the same freezing windows.

I guess, adding a custom field (sum of 6 columns in this case) cause this. SQLite table has about 300k rows…

What should I do?