I've just checked your statisics. You had a large gain of views for around a day, between May 1 to May 2, followed by a sharp decline that happened at almost the same rate. Each chapter had an average of about 60 reads, and viewership didn't fall off much at all, so readers didn't lose interest.
I think the answer is obvious, what happened was that you put up all your chapters in a short span of time. Precisely the same days mentioned above. This caused views to increase quickly as readers went through the five chapters given in 1-2 days. Then as the chapters were exhausted with no new releases being posted, naturally, views rapidly slowed down.
There's no need to panic, my friend, this was the normal series of events to occur by releasing a bulk number of chapters in one go. If it bothers you, I suggest increasing intervals between releases.
Yes, that means you probably wouldn't get a sudden increase of viewership by slowly posting chapters one by one. However, you'll have a more stable viewership.
Coincidentally, my novel was released just one day before yours with similar number of views, and I released a total of 3 chapters on different days. You can check out my statistics to compare with yours, if you'd like. It's also a good idea to check out statistics of other novels, big and small, to get a feel about what is normal.
In conclusion, there is nothing wrong happening right now. It isn't a bug, nor is your novel bad. You'll understand as time goes by and you make new chapters. :)