Lost mythic legendary when server error caused me to be kicked out of game (I think)

I bought a mythic unique cache, opened it, and equipped the weapon for Spiritborn. The game kicked me off and when I logged back in, the mythic weapon and the two resplendent sparks were gone. It should easily be proven because I beat Lilith and I finished the Lunar line, for the two sparks to get the mythic but no weapon and no sparks anywhere. This is on Xbox series X and happened on Feb. 6, 2025 around 5:45 AM CST. I really need help.