I have automatically claim draw turned on but in this correspondence game it didn't work yet the position repeated 3 times.lichess.org/ohSlDayp/black#40
Thanks for reporting. Should be fixed, now.
Thanks, specifically this was a recent issue:"the compressor was appending position hashes to the array"and by un-reversing the compressor input the Huffman encoder produces consistent hashes! Hooray for magic. :-)
I was just about to suggest that someone checks the position arrays added by the compressor. Glad you lot got there first.