Sometimes the LTI tool dashboard shows attempt scores of N/M (X%), where N/M is correct, but X is wrong. IIRC the downloaded marks CSV also shows an incorrect N and X (although self-consistent).
For comparison, the downloaded attempts CSV shows the correct values for N. I didn't try the JSON download.
Only a few attempts (<10, I think, in a class of 120) showed the bug.
Sometimes the LTI tool dashboard shows attempt scores of N/M (X%), where N/M is correct, but X is wrong. IIRC the downloaded marks CSV also shows an incorrect N and X (although self-consistent).
For comparison, the downloaded attempts CSV shows the correct values for N. I didn't try the JSON download.
Only a few attempts (<10, I think, in a class of 120) showed the bug.