Monthly count disappears on IAR screen

Description

When running the IAR starting with Weekly Count 4/24 the Monthly Count on 4/30 does not display to be selected
Environment : PROD
Store : Example 03283
 Steps
1. Navigate to URL https://m.inform.cfahome.com/?bypass_sso=true 
2. Navigate to Store 03283
3. Click on the Menu> Reports > IAR
4. Select the weekly count on 4/24 

Results :  The monthy count on 4/30 disapears from the drop down screen

Expected : For the Monthly count not to disapear

Can we determine why the Monthly count is disappearing once the weekly count on 4/24 is selected