This is the honest tradeoff you get. As long as the server doesn't destroy the stored data, your items are decryptable again when the server goes back online. You can always run your own server, a single PHP file using sqlite. The server script stores its keys forever by design, 100 something bytes per entry.
So when the server goes down, the offline data goes with it. Not great, but not the worst mitigation.
This is the honest tradeoff you get. As long as the server doesn't destroy the stored data, your items are decryptable again when the server goes back online. You can always run your own server, a single PHP file using sqlite. The server script stores its keys forever by design, 100 something bytes per entry.
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