Three Sui mainnet halts in 48 hours traced to an upgrade bug by developers

Share Share this article Copy link X icon X (Twitter) LinkedIn Facebook Email Three Sui mainnet halts in 48 hours traced to an upgrade bug by developers The Sui Foundation s post-mortem published Sunday traces all three outages to interactions between a new address-balance feature shipped in the v1.72 release and the network s existing gas and consensus logic. By Shaurya Malwa | Edited by Sam Reynolds Updated Jun 1, 2026, 6:02 a.m. Published Jun 1, 2026, 5:38 a.m. 3 min read Make preferred on What to know : Sui’s mainnet halted three times on May 28 and 29 after a new v1.72 feature exposed an edge case in the blockchain’s gas-charging logic, according to a post-mortem from the Sui Foundation. The first two outages stemmed from related bugs in how mixed gas payments were handled when transactions lacked sufficient funds, while the third resulted from a latent bug tied to the network’s on-chain randomness protocol during validator restarts. No user funds were lost or transactions reversed, but the SUI token fell about 19 percent over the week, and the incidents marked the network’s third major reliability failure since its 2023 mainnet launch. A new feature shipped in Sui s v1.72 release exposed an edge case in the Layer-1 blockchain s gas-charging logic that halted mainnet three separate times across May 28 and May 29, with each fix either triggering or exposing the next failure, the Sui Foundation said in a post-mortem published Sunday .