Welcome to the forum.
First of all, I'm not sure if this goes on "Bug Reports" because this isn't a Rainlendar's bug.
Viewing the file seems OK, but in a closer look, there are 3 characters at the beggining of the file: 0xEF 0xBB 0xBF. You will see here in Wikipedia en.wikipedia.org/wiki/Byte-order_mark#Representations_of_byte_order_marks_by_encoding
(see under UTF-8) that this characters can/could cause troubles in some programs.
I remove these characters and Rainlendar2 reads "25 events and 0 task". So, I think that's the bug.
Then, the idea is: Try to save your files in UTF-8 without BOM.