Problem description

On daylight savings for Australia (2am AEDT on Sunday 3 October), my Anki has an blank box for reviews, but my Anki still says my current streak is 195. I thought that I just missed my Anki reps, but since my streak was still going I thought that was weird, and I didn't give it too much thought until another Australian in a Discord server also had the same problem as me.
Note: I updated to the latest Anki version, but I'll revert back to Anki 2.1.35 to get my addons to all work. Since Migaku hasn't been updated. Might not be relevant though.

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 2.1.48 (fb07bad3) Python 3.8.6 Qt 5.14.2 PyQt 5.14.2
    Platform: Windows 10
    Flags: frz=True ao=True sv=2
    Add-ons, last update check: 2021-10-08 13:22:56
    
    
    ===Add-ons (active)===
    (add-on provided name [Add-on folder, installed at, version, is config changed])
    AJT Mortician ['1255924302', 2021-08-14T10:36, 'None', '']
    Migaku Dictionary ['1655992655', 2021-07-03T06:55, 'None', mod]
    Migaku Japanese ['278530045', 2021-04-13T08:36, 'None', mod]
    Review Heatmap ['review_heatmap', 2020-04-30T23:23, 'None', '']
    
    ===IDs of active AnkiWeb add-ons===
    1255924302 1655992655 278530045
    
    ===Add-ons (inactive)===
    (add-on provided name [Add-on folder, installed at, version, is config changed])
    '' ['PassFail (EN)', 0, 'None', '']
    AnkiConnect ['2055492159', 2021-07-14T10:59, 'None', '']

Example images: