Breaking blocks on 1.21 feels slow on a 1.8 backend

[alexmarkey]

/viaversion dump Output

https://dump.viaversion.com/6c658cb23ec1f48a84477af6ea82782a168360ddf7a481ad353bb1d19813d4f2

Console Error

No response

Bug Description

There seems to be an issue with 1.21 clients on 1.8 servers in regards to mining blocks (more noticable when using high levels of efficiency). For the sake of this test, I am using a high level of efficiency (level 100) so the bug is more clear, but I believe this might be a bug in general with breaking blocks?

Server Backend = 1.8.8
Client = 1.21

1.21 client = https://gyazo.com/e13efa1c02dd9bd02f34912354b8b4fc
1.20.1 client = https://gyazo.com/683d7972eeb7a9b0959931700e011a4f

From the above gifs you can see that the blocks do not seem to be breaking properly on the client when using 1.21. They are still breakign correctly but there is no break animation on the client, and feels very delayed (I have 200ms ping on the server I am testing)

Steps to Reproduce

• Login to a 1.8.8 server with a 1.21 client
• Give yourself a pickaxe with a high level of efficiency (a pickaxe that will essentially insta-break a block)
• Break a piece of stone with this pickaxe
• The client will not see the break instantly (assuming you're not on a local server)
• I have a 200ms ping (Australia) so I see the blocks break on my client 200ms later

Expected Behavior

Blocks should break instantly on my client, not 200ms later

Additional Server Info

We're using Velocity

Checklist

• Via plugins are only running on EITHER the backend servers (e.g. Paper) OR the proxy (e.g. Velocity), not on both.
• I have included a ViaVersion dump.
• If applicable, I have included a paste (not a screenshot) of the error.
• I have tried the latest build(s) from https://ci.viaversion.com/ and the issue still persists.

[Barvalg]

Please update all Via* plugins from https://ci.viaversion.com/.In case the issue still persists send the new dump and the issue will be reopened