Progress not displaying on Heatmap in Continuous Timeline mode specifically on the April month

[TheRevenant99]

Problem description: When I select the Continuous Timeline mode on the heatmap feature, my progress is not displayed on April month. This issue is not present when I select the other modes, such as yearly overview mode.

Checklist

Please replace the space inside the brackets with an x if the following items apply:

• [ x ] I've restarted Anki to see if it helps
• [x ] I've verified that I use the latest version of the add-on by redownloading it from AnkiWeb
• [ x] I've verified that I use the latest version of Anki by checking at https://apps.ankiweb.net#download
• [ x] I've tried to disable other add-ons to see if there are any interactions present
• My issue disappears when I hold shift while starting Anki.
• [ x] I've checked if anyone else reported this problem before by looking through the issue reports. I also checked to see if there is a section about known issues in the add-on description, documentation, or README.

Information about your Anki set-up

Please open Anki, go to Help → About, click on "Copy Debug Info", and paste the result between the backticks below (if the button does not appear you are using an older version of Anki 2.1 and will need to update first):

    Anki 2.1.60 (76d88073) Python 3.9.15 Qt 6.3.2 PyQt 6.3.1
    Platform: macOS-13.2.1-arm64-arm-64bit
    Flags: frz=True ao=True sv=3
    Add-ons, last update check: 2023-04-17 23:26:58
    
    
    ===Add-ons (active)===
    (add-on provided name [Add-on folder, installed at, version, is config changed])
    AMBOSS add-on ['0amboss_addon', 2023-04-13T12:27, 'None', '']
    Advanced Browser ['874215009', 2022-09-27T03:28, 'None', '']
    Button Colours Good Again ['2494384865', 2022-09-27T13:18, 'None', '']
    Clickable Tags v20 original ['380714095', 2022-01-31T00:58, 'None', '']
    Colorful Tags  Hierarchical Tags ['594329229', 2022-09-15T18:06, 'None', '']
    Custom Background Image and Gear Icon ['1210908941', 2023-03-04T21:54, 'None', mod]
    Image Occlusion Enhanced ['1374772155', 2022-04-09T10:15, 'None', '']
    Review Heatmap ['1771074083', 2022-06-30T04:43, 'None', '']
    Special Fields ['1102281552', 2022-11-22T04:49, 'None', '']
    Symbols As You Type ['2040501954', 2022-06-08T07:09, 'None', '']
    True Retention ['613684242', 2017-11-19T22:43, 'None', '']
    
    ===IDs of active AnkiWeb add-ons===
    1102281552 1210908941 1374772155 1771074083 2040501954 2494384865 380714095 594329229 613684242 874215009
    
    ===Add-ons (inactive)===
    (add-on provided name [Add-on folder, installed at, version, is config changed])
    

Error message (if any)

If you've received an error message, please copy and paste it between the backticks below: