Cache of Undermine Treasures - - Time walking weekly - Duplicate bug

Has anyone else experienced duplicate items week on week?
I’ve joined back after a break since shadowlands, and have played for 4 weeks currently.
I’ve done the timewalking event 4 times on my DK, I’ve had the same head item drop from the chest twice, and now the same trinket twice in a row so in 4 caches I’ve only really gotten 2 items… it seems the odds of this happening are exceptionally low for pure RNG.
Anyone else had a similar issue?

Not a bug, just RNG.

Something having 0.1% of happening means that out of 1 million characters, 1000 are expected to experience it. You just happened to be one of those.