when updating from http2 4.1.4 -> 5.2.2 I started encountering occasional failures with this error message:

StreamErrorIsSent FlowControlError 1 "window update for stream 1 is overflow"

There's some weird things in the log where it tries to increase the upper bound of the window by 2^31-1.

I have tried trouble shooting it but I haven't had any luck reproducing it with a small example but it looks like maybe it's related to an endianness bug.

I'm at a bit of a loss here. I was looking at whether it might have been nginx modifying http2 frames but I'd be very surprised if that would be the case.

Do you have any ideas of where I could start trouble shooting?
What code actually picks which size to upgrade the window by?
What would happen if the window upper bound would actually reach maxBound @Int, is there any logic to reset the window size?

Thank you so much in advance for any pointers!