Permission issue with concurrent guests

Cluevo 1.6.2
WP 5.7.1

I seem to be getting a permission error when concurrently accessing learning content as guest.

Scenario for guests (none logged in):
1. On Safari, I open a scorm learning module – good
2. On Chrome, I open the same scorm learning module – good
3. I go back to Safari and try to open the same module again – permission error
4. On Chrome, incognito, I open the same scorm learning module – permission error
5. I go back to the first Chrome window, open the same module again – good

Changing settings and resaving in the backend doesn’t change anything… after a long wait, it seems to reset back to step 1, and it happens all over again.

Any ideas?

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