We recently have issues with transaction not getting broadcasted seemilngy random.
On example (of many).
Here are 3 tx hash we got of the “same” (nonce) transaction we tried to send out. Only the last one was broadcasted.
It is no issues with the gas is too low as we had problem previous with, those have gas prices of 72, 69, 70 gwei respectivly.
I suspect that Infura currently has a degraded node(s) which transactions never get broadcasted or some other issue because on our end there is no communication errors between us and Infura and we do get a tx hash from Infura and no errors. And it seems random whenever a tranasction gets broadcasted when we “bump transactions”/resend same nonce. It eiter works the first time or in other cases after 3-5 resends (even with the exact same data so the same tx hash is created).