[GNC] Error running Advanced Portfolio report

[Dino Carubia]

I'm using GnuCash Version 3.7.  When I run the Advanced Portfolio report, it processes for a bit, then it stops and I get a partial report with an error message: "There is an error processing the transaction 'buying .0030 share units'. This may to be caused by a sell transaction causing a negative stock balance, and a subsequent buy transaction causing a zero balance. This leads to a division-by-zero error. It can be fixed by preventing negative stock balances."
I have searched for a transaction where I am buying .0030 shares and cannot find it.
Is this a known bug or a "feature" of 3.7?  Why does the order of negative and positive stock balances matter when processing this report?
Any help would be appreciated, thanks!
Regards