Nether Portal don't spawn in the Nether, instead you spawn in blocks under the surface.
Also your armor disappear in the HUD, it's can be resolved by disconecting and reconnecting into your world.
Linked issues
duplicates 1
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AndiIf you have not, please use the search function in the future.
Dupe of MC-89928 and MC-88179
Next time, please submit a separate ticket for each bug instead of putting them both in one 😉