Is this a bug?

Question

I completed the CSS3 tutorial on my mobile phone but the next day on my pc it said I hadn't completed the font-face when it showed I completed the quiz for that module. I also had started the background. It's not that big of a deal but I thought I'd bring it to attention. Thanks!
Edit:
I went back on a finished the lesson and it let me go to backgrounds etc but it allowed me to resume where I left off strange...
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Image link
https://cdn.discordapp.com/attachments/410712993639432192/532366117251842089/unknown.png

Answer 1

If you think this is a bug
You can mail "[e-mail]"

Answer 2

Normally, retaking the quiz while you are online will help[make sure u r online].
And you can send bug reports to [e-mail]

Answer 3

happened to me just do the test again and it will be fine

Answer 4

I have similar problems but they concern the discuss area. Messages are only shown on certain devices.

I think there is an error with the syncronization.