This is hardly the first instability the network has demonstrated, much to the chagrin of its users. Transaction flooding is an issue on Solana in part because of the low transaction fees compared to networks like Bitcoin and Ethereum, which have relatively high gas fees that would make flooding extremely expensive.
On April 30, NFT minting bots began flooding the Solana network with 4 million transactions per second, causing the network to lose consensus. The project tweeted that "Engineers are still investigating why the network was unable to recover, and validator operators prepare for a restart." The network was offline for seven hours.