Format and other buttons greyed out using frozen fields

[JanitorHead]

Problem description

Using Anki 2.1.48, frozen fields make the buttons in the bar grey out, disabling frozen fields fix the issue.

Checklist

• [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

    Anki 2.1.48 (fb07bad3) Python 3.8.1 Qt 5.15.1 PyQt 5.15.1
    Platform: Linux
    Flags: frz=True ao=True sv=2
    Add-ons, last update check: 2021-11-04 09:05:39
    
    
    ===Add-ons (active)===
    (add-on provided name [Add-on folder, installed at, version, is config changed])
    AnJoy ['anjoy', 2019-07-31T23:02, 'None', '']
    Calculate New Cards To Do ['calculate_new', 2021-10-21T03:55, 'None', '']
    Cloze Overlapper ['cloze_overlapper', 2019-02-01T13:37, 'None', '']
    Colorful Tags ['594329229', 2021-09-02T04:02, 'None', '']
    Exam Notifier ['exam_notifier', 2021-09-02T14:35, 'None', '']
    Frozen Fields ['frozen_fields', 2020-02-21T21:26, 'None', '']
    Image Editor ['307397307', 2021-09-10T12:41, 'None', '']
    Image Occlusion Enhanced for Anki 21 alpha ['1374772155', 2020-04-28T04:21, 'None', '']
    Learning Step and Review Interval Retention ['1949865265', 2020-12-28T23:40, 'None', '']
    Load Balanced Scheduler ['208879074', 2018-10-05T02:06, 'None', '']
    Mini Format Pack ['295889520', 2018-07-24T19:45, 'None', '']
    More Decks Stats and Time Left ['1556734708', 2021-01-27T10:09, 'None', '']
    More Overview Stats ['2116130837', 2021-05-29T13:24, 'None', '']
    Pop-up Dictionary ['popup_dictionary', 2021-08-05T00:30, 'None', '']
    Puppy Reinforcement ['puppy_reinforcer', 0, 'None', '']
    Resize images in editor ['1103084694', 2021-07-19T08:35, 'None', mod]
    Review Heatmap ['review_heatmap', 2018-10-28T23:06, 'None', '']
    Search Everywhere - Ctrl+F Find ['search_everywhere', 2020-03-31T22:13, 'None', '']
    Speed Focus Mode ['speed_focus_mode', 2021-09-30T18:12, 'None', '']
    Straight Reward ['957961234', 2021-01-11T13:37, 'None', '']
    Syllabus - Anki Statistics and Export by Tag and Deck ['668156440', 2020-01-12T12:47, 'None', '']
    The KING of Study Timers ['907028815', 2021-09-03T19:17, 'None', mod]
    True Retention ['613684242', 2017-11-19T21:43, 'None', '']
    Web Browser - Search terms Import texts and images automatically ['864545277', 2021-10-12T00:33, 'None', '']
    
    ===IDs of active AnkiWeb add-ons===
    1103084694 1374772155 1556734708 1949865265 208879074 2116130837 295889520 307397307 594329229 613684242 668156440 864545277 907028815 957961234
    
    ===Add-ons (inactive)===
    (add-on provided name [Add-on folder, installed at, version, is config changed])

Add-ons screenshot: