BUG: Average rating not recalculating on submit new review

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Describe the bug When a new review is posted , the review count goes up, but the average rating does not change until the page is refreshed.

I can't figure out what is the calculation to use for the average rating field.

At the moment I have (Average Rating + new Rating) / Review count - but this is technically not correct. It shouldn't be average rating, it should look at all existing reviews and add the individual ratings together from scratch and then re-average them all at the same time. Otherwise, a different result is produced. Right now , it's not doing anything

To Reproduce Steps to reproduce the behavior:

1. Go to 'Reviews'
2. Click on '.Post a review'
3. Add a rating and a review comment
4. Click Post
5. See error - review count up by 1 but the average rating has not changed.

Expected behavior Average rating should change

Screenshots

Desktop (please complete the following information):

• OS: [e.g. iOS]
• Browser [e.g. chrome, safari]
• Version [e.g. 22]

Smartphone (please complete the following information):

• Device: [e.g. iPhone6]
• OS: [e.g. iOS8.1]
• Browser [e.g. stock browser, safari]
• Version [e.g. 22]

Additional context Add any other context about the problem here.

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Tutor has tested this this morning, and the average rating seems to be updating now.

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I've just tested this during the responsive testing on https://www.responsivedesignchecker.com/ and the rating is recalculating correctly as well. Need to keep an eye on this.

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worked