Whenever I scroll down, I can not see any more courses. Normally I could see all available courses but now it only loads 15 courses and nothing else.
Is this a bug and when will it get fixed because it’s pretty annoying
Do you mean:
a. that you could see all Memrise course (Japanese or otherwise), or
b. that you could see all Japanese courses, both user-created and Memrise
If you are referring to b, then I can tell you that since about January (?) this year the course search in the app will only show Memrise generated courses, so if you see about 15 Japanese courses in the app, that could be right (though I don’t know how many Memrise exactly has for Japanese).
You can still learn any course using the app, but first search on the web, start the course. Just the first step planting of one word is enough. Then pop over to the app, and the user-created course you started on the web, should appear there.
Hello @Voylinslife 
. I use the web version and this has been happening to me for about 1 week now. The search for Japanese courses only shows 15 courses (web version). If this happens to you, your profile setting should be: I speak British English.
I had not commented on this yet because Memrise is updating Japanese courses for British English speakers. During the last week, Memrise added the Japanese 0, and changed the Japanese 1 to the new version. Japanese 2 (current version) was visible, but a few days ago, it does not appear anymore (maybe it will have a new version too?). I was waiting a few days to see what happens.
For now, in the page of search of Japanese courses, if you change the option of the left of the screen, where it is written: I speak British English, for I speak American English, you will see all the Japanese courses that appeared before. Just be careful that, in this case, the official Japanese courses are for American English speakers. I believe that user-created courses do not have this differentiation. The change in the language setting on the left side of the screen is only for the search, so this will not change the language setting of your profile.
PS: I’m sorry. I do not speak English very well, but I hope you can understand what I wrote 
Edit: Instead of changing the language on the search page (British English to American English), you can also access it through the link:
Hello @Voylinslife. I was able to talk to KanaTsumoto, who is responsible for the official Japanese courses, and the problem was solved 
See the post below: