[MC-305103] The panorama sometimes spins too fast when saving or loading a world

The panorama spins too fast when saving a world

Linked issues

clones 1

MC-269384 The panorama sometimes spins quickly when entering or exiting a world Resolved

is duplicated by 3

MC-305107 The background image rotates very quickly Resolved

MC-305178 Loading into a world speeds up background panorama Resolved

MC-305297 Panorama Speeds Up When Saving/Loading World Resolved

Attachments

Comments 5

0x7 2026-01-07T08:33:28Z

Able to recreate this for version 1.21.11, altho it rarely happens.

0x7 2026-01-12T20:34:18Z

I’ve discovered that this happens when the world that you are currently in is experiencing heavy lag.

phizlip 2026-01-25T06:38:59Z

This just happened to me in 26.1 Snapshot 4, when I exited the game by quitting it with the upper right close button.

phizlip 2026-01-25T06:43:14Z

phizlip 2026-01-29T03:53:14Z

The panorama rotation uses DeltaTracker.getRealtimeDeltaTicks() in net/minecraft/client/renderer/PanoramaRenderer, which is based on UI time (not game ticks). When saving by exiting the game the UI thread can stall so the next frame sees a large real time delta spike, and the panorama advances a bigger step, making it appear to spin too fast.