Prev/Next month displays problem in the Calendar page

[iaratagram]

Describe the bug
The medication record of current month will be shown in all the next and prev months.

Expected behavior
the medication record on calendar doesn't change after clicking next/prev month button.

To Reproduce
Steps to reproduce the behavior:

1. Go to 'calendar.wxml'
2. re-enable prev/next month button by setting next=true and prev=true
3. re-compile and try clicking the prev/next month and you will see the bug describe above

Possible causes of the bugs
IDK

Reporter: Yunzhang (Jara) Jiang