It's just a development that is to be expected i guess. First Ethereum gas fees were extremely high then the binance smart chain was introduced and quickly became more and more popular because there the transactions were almost instant and the transaction fee were only a few cents compared to 20 dollars on the ethereum network. Because of that a lot project switched from Ethereum to BSC and new projects decided to choose BSC instead of ETH as their blockchain ecosystem. Now that more and more projects are on the BSC it becomes obvious that the binance smart chain is also not Infinitely scalable and you can already see the effects of the increasing numbers of transactions on the BSC.