My skin does not load in Minecraft Java Edition

Subject: My skin does not load in Minecraft Java Edition

Account:

• Account type: Microsoft

• Confirmed: Logged in correctly in the Launcher

Issue details:

• When I log into Minecraft Java Edition, my skin does not appear in the game (only Steve).

• I have already verified that I am connected with my official account.

• I have checked in the Launcher that I am not in “Play Offline” mode.

• I verified at https://www.minecraft.net/profile and my skin is correctly configured.

• I logged out and back into the Launcher, but the issue persists.

• I also cleared the .minecraft cache and forced the update, with no results.

• The problem happens all the time, not intermittently.

Steps already tested without success:

1. Verified login status (confirmed ✅).

2. Re-uploaded the skin on the official Minecraft website.

3. Logged out and back into the Launcher.

4. Cleared .minecraft cache (folders caches and assets/indexes).

Additional information:

• Platform: Windows 11

• Game version: 1.21.8

• Official Microsoft/Minecraft Launcher

Request:
Please, I need help to make my skin load correctly in Minecraft Java Edition.

P.S.: When I upload a skin directly in the client, it appears at first but then resets back to the default (Steve/Alex) afterwards.