Mac OS Catalina 10.15.1
FPP v1.8-63-gabcfb17
I am running my sequence from last year and all the fseq files were generated with the xlights version that would have been current around 27 Dec 2018. My playlist of about 30 songs is running fine when I run with those fseqs . I would have generated that playlist/sequences with the Mac Sierra current at that time. Fortunately, I have made back-ups of all those files.
I needed to modify some minor light counts. I downloaded the lates flight version 2019.68. I opened up a song as a test (Hark the Herald Angels Sing) and saved. When I uploaded it to my Raspberry PI/FPP, FPPD stops whenever the updated file attempts to play. I re-uploaded and the old Hark the Herald fseq works fine.
This may be a red herring, but I noticed that the old/good fseq file is around 103.7 MB. The new fseq file generated with 2019.68 is only 4.1 MB. I have opened up the sequence file, and let it play all the way to the end before saving, but it is still only about 4.1 MB.
I have attached the what appears to be the bad sequence, but can send the good file too if that would help.