All browsers except Fire HD 10 plus tablet resolve DNS of HAOS on Raspberry Pi

I’ve updated HA to the latest Core and OS, installed on my RPi4 SSD.
I can access HA via the following devices on my network with no issue after logging in:

  1. Personal mobile device, iPhone, wifi, browser: Firefox
  2. Work mobile device, iPhone, wifi, browser: Safari
  3. PC (personal desktop), wired, browser: Firefox
  4. PC (work laptop), wired, browser: Microsoft Edge
    I try on my 5th device, a Fire HD 10 Plus tablet with Firefox installed, using the same external and internal URL for my HA, and I get the error, “Address Not Found. The browser could not find the host server for the provided address.”
    Brave browser yields the error, “This site can’t be reached. homeassistant.local’s DNS address could not be found. Diagnosing the problem.”
    Fully Kiosk browser yields the error, “Webpage not available. The webpage … could not be loaded because net:ERR_NAME_NOT_RESOLVED”

The goal here is to get access to my HA via the Fire HD 10 Plus tablet. I have it stripped in order to run Fully Kiosk efficiently, but it’s still a fully functional tablet. I am able to login to my router from it, as well as Pi Hole. I have PiHole running on another Raspberry Pi so I thought that maybe that was preventing DNS resolution, but I am able to access HA on every other device I own on my home network.
I will add that on the 4 devices I can access HA via IP address as well. Wifi is mesh.

This seemed to have resolved itself. I made no changes from the time of the original post and the Fire tablet is now able to load my HA through the browser.