we have run into the same problem as mentioned in https://github.com/matomo-org/matomo/issues/7851
When looking at Ecommerce/Overview the average order value graph sticks to zero regardless that the summary and API call report a value other than zero.
Our Matomo (3.13) setup is still the same as described in https://github.com/matomo-org/matomo/issues/15240
Please let me know, if you need any further information and thanks for your efforts in advance!
If this question was directed to me - no, we don't experience anything mentioned in #15200
I can reproduce this... Might have a chance to look at this while working on https://github.com/matomo-org/matomo/issues/11615
Looks like this yet might be related to https://github.com/matomo-org/matomo/issues/15200
When using English all numbers are correct (the number and formatting of the number) - but when using German as language setting, the numbers in the visitor overview are misformatted and partly wrong rounded.
But this partly also applies to the Ecommerce overview: For example, in English the conversion rate is shown with 0,5% (which is correct) and in German it is shown with 0%