This is the second time this happen to me (at least the second time I know of)
Last time this happen was long ago (more than a year ago).
What happens?:
When editing something (adding a template for a React.js article on Polish Wikipedia)
The edit deleted changes done by someone else. I've seen that Wikipedia has something
that prevents conflict edits. But it didn't detect anything. I'm not sure if I suppose to enable
some Gadget to make this working. I've seen conflict feature some time ago.
What should have happened instead?:
I should get a warning that my edit will delete someone else changes
Other information (browser name/version, screenshots, etc.):
This is the link to history:
https://pl.wikipedia.org/w/index.php?title=React.js&action=history
When editing the article I added template:
{{Frameworki do aplikacji webowych}}
Nothing more. There is a chance that this happened more times and I only don't know
because no one added a note on my discussion page.