After a massive correction of the crypto market on June 16, ETH was exposed to another correction a few days ago. But, most clearly, these problems have been observed during the large ICOs, like the recent Status ICO, which clogged up the Ethereum Blockchain. The ETH website was down for periods of time due to the traffic problems.
On the market, ETH price instantly reacted to these congestion issues and started to drop.
Vitalik Buterin has not yet spoken on the issue. While there are clearly some problems, ETH price uncertainty will remain. Technically, ETH can be traded with a low stop from the support level of $310 but fundamental factors outweigh, suggesting refraining from the opening positions of the ETH/USD.