Hello!
At least, there is some progress! I am sorry that it takes a long time to get it working.
Personally, I didn't find big differences by doing it with NextSeq data. So I am not sure if it will fix the issue, but maybe it will work in your case.
I would try the following:
- Run Dada2 with F reads and increased "--p-min-fold-parent-over-abundance". Check post here.
- Merge reads with vsearch and run Deblur
- Use only F reads with Deblur
Best,