Dashboard reverted to older data

I have been using metabase for about 3 weeks now. After the first few days, I created a some saved questions. Then in the last 2 weeks, I had created some advanced dashboards. There was some sort of process restart on the server, and now I only see the questions that I created within the first few days. All of the other content has been lost.

Does anyone have any suggestions as to what happened or what troubleshooting I should do?

Is it just expected that H2 is not really a fully functioning way to run this system?