sendme closes client connections

Since upgrade to nightly (0.4.1.1-alpha-dev-20190523T134010Z-1~d90.stretch) connections are closed regularly after short data transfers (even irssi via ssh):

Connection to ... closed by remote host.

[info] sendme_process_stream_level(): Unexpected stream sendme cell. Closing circ (window 500).
[info] command_process_relay_cell(): circuit_receive_relay_cell (backward) failed. Closing.

https://gitweb.torproject.org/tor.git/tree/src/core/or/sendme.c#n468

To upload designs, you'll need to enable LFS and have an admin enable hashed storage. More information