Starknet Back Online After Mainnet Freeze Raises Reliability Concerns

TLDR

• Mainnet freeze traced to proving bug; chain reverted to 5,187,263 blocks.
• Two-hour halt stalled transactions and revived questions about reliability.
• Second outage since Grinta upgrade adds pressure to Starknet performance.
• Engineers testing safeguards; full post-mortem and recovery plan pending.
• Network expands with Bitcoin staking even as stability challenges linger.

Starknet entered the week under renewed pressure as the network faced a mainnet halt that lasted several hours. The layer-2 system stopped block production early Monday, and this interruption immediately affected transaction processing. Moreover, the incident revived concerns about Starknet and its operational stability as the platform moves into 2026.

Starknet Block Production Stops Amid Proving Error

Starknet halted activity just before dawn as its systems detected a proving issue on a pending transaction. Engineers began investigating the error, and the halt prevented new blocks from forming on the mainnet. Consequently, users could not submit or finalize transactions while the team worked to secure chain integrity.

Developers then traced the problem to a bug and assessed its impact on network performance. They executed additional testing to confirm the error and determine safe recovery steps. As work continued, the block height remained frozen for more than two hours.

The team ultimately reverted the chain to block 5,187,263 and restored operational flow. They resumed block production after confirming state consistency across the network. Starknet later noted that some early-morning transactions might not have processed correctly during the restart window.

Second Major Outage Adds Pressure on Starknet Performance

This incident marked Starknet’s second notable disruption in recent months and added new scrutiny to its reliability. The network previously experienced a longer outage in September after its Grinta upgrade. That event forced two chain reorganizations and reversed a significant batch of transactions.

Although Starknet uses zero-knowledge rollups to scale Ethereum activity, the repeated halts have raised questions about its resilience. The system aims to deliver faster throughput, yet unplanned stops interrupt the user experience. Each disruption highlights the complexity of the underlying proving mechanisms.

The platform resumed operations on Monday, but it has not yet released a full technical report. Starknet stated that it will publish details about the root causes and its long-term safeguards. The community now awaits clarity on the measures that will prevent similar freezes.

Starknet Expands Features While Facing Stability Challenges

Starknet expanded its capabilities this year by introducing Bitcoin staking support on its network. Users can now stake Bitcoin natively on the layer-2 chain and earn STRK rewards in return. This expansion demonstrates the project’s attempt to compete across multiple ecosystems.

The network also continues building tools intended to strengthen its rollup infrastructure. These updates aim to improve proving performance and reduce vulnerabilities within block production. Recent outages suggest that upgrades may require further refinement.

Starknet still positions itself as a key scaling system for Ethereum, yet reliability remains essential for adoption. Market participants expect detailed assessments that explain the freezes and outline corrective strategies. Therefore, the upcoming retrospective will play an important role in shaping confidence in Starknet’s roadmap.

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