Question: Why is Threads:-Task:-Continue miscomputing? Is there a bug in Maple 2020.2?

Hi,
I am experimenting with Threads:-Task:-Continue in Maple 2020.2 and sometimes it returns different results depending on N, or, how fine the mesh is. I have modified procedures cont and task in a Maple example shown in a worksheet. I can compare the result from Threads with one I can obtain another way and which surely is correct. The result from Threads depends on N: sometimes it is correct, sometimes it is not. The wrong result is returned only when the Threads:-Task:-Continue loop is executed, of course.

Has anyone spotted that problem? Is there a way to trace what actually is being done in each leaf? Does this problem appear in later versions of Maple?

I would appreciate some feedback.

Thanks in advance,

Rafal Anlamowicz
rablamowicz@gmail.com