Ethereum has confirmed the schedule for its Glamsterdam upgrade while warning that activity on the test network could disrupt preparation. According to CoinDesk, access to free test ether may allow inauthentic builders to bid more aggressively than legitimate competitors and then withhold transaction payloads. Such behavior could interfere with testing and make it harder for development teams to assess the network reliably. The warning comes as Ethereum client teams face only half their usual review period before the Sepolia testing phase. The combination of manipulated builder competition and a compressed review window could complicate readiness checks for the upgrade. The information is relevant to ETH market watchers because Glamsterdam is a significant Ethereum development milestone, although the supplied report does not detail any impact on the live network or provide a launch date. No changes to Ethereum’s mainnet performance or market price were cited.
