Prior to the recent Blockland update, 99% of crashes could be traced back to improperly programmed add-ons. Take for example the fact that Boss Battles, despite being hosted on BlockNet and having a huge amount of custom content, had no problems staying online to the point that the 24 day bug occurred. However, the recent Blockland update has seemingly been prone to crashes and the exact cause is still yet to be discovered. If it's an issue inconveniencing a lot of people and enough current holders of BlockNet servers are interested, I could probably reorganize people's accounts so that one of the two nodes runs r1967 exclusively until an update comes around patching the crash. Like I said though, there has to be more than just one person interested in this since I'd have to reorganize people's accounts on both current nodes. If you're a holder of a dedicated node though, feel free to contact me and I can set up your node to use r1967.
In short, this isn't a problem caused by the service. It's just the game crashing on it's own accord.
Edit: Also, try using the support email in the future. I would have been able to answer your question a whole lot faster. I'm not guaranteed to notice a topic in general discussion.