Same moves appearing in multiples lines in multipv analysis

[mmixu]

General

In MultiPV analysis, the engine sometimes shows the same first move in multiple lines, which seems like a bug since each line should ideally start with a unique move.

Steps to reproduce the bug

I've noticed this happen a few times – here's an example: https://lichess.org/broadcast/qatar-masters-2024--open-a/round-7/a2dDe23s/CHTokH6w

After 5. Bd3 with three engine lines: https://lichess.org/broadcast/qatar-masters-2024--open-a/round-7/a2dDe23s/CHTokH6w#9

After 11. bxc3: https://lichess.org/broadcast/qatar-masters-2024--open-a/round-7/a2dDe23s/CHTokH6w#21

After 11...g6: https://lichess.org/broadcast/qatar-masters-2024--open-a/round-7/a2dDe23s/CHTokH6w#22

After 16...e5: https://lichess.org/broadcast/qatar-masters-2024--open-a/round-7/a2dDe23s/CHTokH6w#32

As far as I can tell, it happens most often with three lines but also occurs with five lines:

After 5. Bd3 with five engine lines: https://lichess.org/broadcast/qatar-masters-2024--open-a/round-7/a2dDe23s/CHTokH6w#9

After 16...e5: https://lichess.org/broadcast/qatar-masters-2024--open-a/round-7/a2dDe23s/CHTokH6w#32

Browser and version (or alternate access method)

Firefox 133.0 and Chrome 131.0.6778.109

[kraktus]

Seems to only happen with cloud evals?

[SG7]

I have seen this behavior, too, on Chrome.