The Open Network (TON), the blockchain closely tied to Telegram, briefly went offline on June 1. The issue was linked to a problem in how the main chain processed its data queue.
According to TON’s developers, block production was paused for a short time before the team pushed a fix. The network was back up within 40 minutes.
The developers said only a few main validators needed updates to get things moving again. They also confirmed that no funds were lost and all transactions made during the outage remained safe.
Block production has been restored ✅
A quick fix was released, and updating only a few master chain validators was sufficient to resume block production.
The incident was related to an error in the processing of the masterchain dispatch queue.
We will release a technical…
— TON 💎 (@ton_blockchain) June 1, 2025
A detailed technical report will be released soon to explain exactly what caused the problem.
Although brief outages are not unusual for fast-growing blockchain networks handling large amounts of data, they can still worry users. In this case, TON’s quick response helped limit the impact.
With Telegram relying more heavily on TON for its crypto plans, the network’s ability to stay stable will be under increasing pressure. For now, it’s back to normal — but questions about long-term reliability are likely to follow.
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