Ethereum testnet Ropsten split following the release of the Istanbul upgrade. This occurred because the upgrade was expected on approximately October 2nd, 2019 and at a block height of 6, 485, 846. The upgrade was released about 48 hours earlier on September 30th at around 3:40 a.m UTC.This, of course, has expectedly caused quite a bit of difference in terms of block confirmation times. Ethereum foundation community manager indicated in a tweet that there is no cause for alarm in this...
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