The Trial Chambers room "slanted" sometimes generates with an entire chunk missing.
Similar to MC-269530
Pre 1.21.0.20:
Seed: 2631036247672599778
Coordinates: -683 -2 855
1.21.0.20 to 1.21.0.22: (Thanks Invisible826)
Seed: -7325843019625900556
Coordinates: -510 -37 -870
1.21.0.23+ : (Thanks Invisible826)
Seed: -2435487164520413695
Coordinates: -1470 -20 305
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Comments 11

Could you please provide the seed?
Also, Bedrock and Java Edition use different project, so this is not a duplicate.
An entire quadrant (as shown in the second screenshot) is missing. (by quadrant, I mean what is placed on Java Edition with /place template minecraft:trial_chambers/chamber/slanted/quadrant_1 through quadrant_4)
In 1.21.0.20, a Trial Chambers no longer generates at this location, and I haven't been able to find another instance of this happening, so it might be fixed, or it might just be very rare.
There you go...
After 1.21.0.20
Seed: -7325843019625900556
Coordinates: -510 -37 -870
Trial chambers generation has changed to match Java Edition in 1.21.0.23, this is taken from my comment in MC-269530.
After 1.21.0.23
Seed: -2435487164520413695
Coordinates: -1470 -20 305
Is this still an issue? I am on 1.21.0.26 Preview at the moment, and the provided seed in the comments for this version no longer seems to reproduce this issue.