I’d never seen “uenc” in a URL before, I just had to Google it. I found this article if you’re interested: WTF is UENC? Essentially, I believe the URL is used to Add and item to cart. So, in the example you gave above the first URL would/should add Product (with ID) 265 to the cart.
So, I don’t have a specific answer for you here… But I spotted some issues that might be related. At the very least, some leads for you to chase:
- Default Cookie Policy: There is a setting in Configuration > General Web > Default Cookie Settings > Cookie Restriction Mode. Setting this to “Yes” is Advised for GDPR, however it kinda breaks the site until the customer hits “Accept Cookies”.
- I tried adding
MB19090253to the cart via the Product Grid page using the Quick View function. However, nothing happened. This was before I clicked “Accept Cookies”.
So, I’m thinking:
- 404s might be generated from the Quick View function (in some way) when customers try to interact with the site before Cookies are enabled.
- The Quick View function is broke in some form
Albeit, I could be leading you in the wrong direction… But at least it’s something for you to look into.
Bonus observations
- Your
sitemap.xmlonly contains categories (not products) - You need to add trustpilot and cloudfront to your CSP list to stop generating Console reports. (Ref: Removing Content Security Policy Warning (Magento 2.3.5 and above))
-
/pub/media/captcha/base/b8ee33bbc19360d621cee2e043ab439c.pngis trying to load on the homepage but does not exist, which is a source of your 404. In fact, I ran a 404 report and the only automatically crawled 404s were related to this recpatcha URL. Perhaps this is a module you’re using that’s broken? - Because my 404 crawler didn’t find any URLs containing “uenc”, it makes me think the issues are caused by human interaction.
Hope this helps.