After updating the plugin about ~2 weeks ago, my webmaster page (hidden link) started showing, that my pages use 302 redirect instead of 301. That's a big mistake and it has already impacted on my website's SEO. The search engine already replaced my pretty urls with ugly '?p=number' ones.
So if you try to open hidden link, developer console will show you, that the page uses 302 redirect. Before I updated the WPML plugins, I've never seen these issues (I always saw 301 redirects, and it's absolutely OK).
I mean, if you open the page hidden link, it will redirect you to the proper page (with custom slug), but with a wrong redirection code.
Link to a page where the issue can be seen:
Any webpage in my website (translated or even original): hidden link hidden link
I expected to see:
301 redirection from pages like hidden link to proper urls with a proper (301) redirection code.
Instead, I got:
302 redirection to the proper url.