Squid and glow squid collision rule error.
Also affects the bubble columns.
16w06a: No rubberbanding, but still collision error or not synchronized.
In 16w07a rubberbanding again.
In the water also slightly affect.
Code analysis
Based on 1.11 decompiled using MCP 9.35 rc1
The problem is that the motion handling part of the code is only done server-side. This includes setting the horizontal motion (X and Z) to 0 and reducing the vertical motion (Y) when the squid is not in water. Because of that the server resets the horizontal constantly while client-side it changes when the player pushes the squid.
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This issue has been fixed in 16w06a
No rubberbanding, but still collision error / not synchronized.
Mod please reopened.

Confirmed for
16w06a
Like @unknown says squids are desynchronized. You can push them around but once you hit them, they will reappear at their original position.

I tested this in 18w22c and got the exact same result.

it still happens in 1.14 Pre-Release 5
it is when squids go over bubbles produce by soul sand

it is still happening in 1.14.1 pre-release 2. it still causes by bubble produced from soul sand

Still Present in Snapshot 20w19a

Confirmed for 1.16-Pre1

I just saw this in 1.16.2.

Affects 20w46a

I can't believe this bug hasn't been fixed yet and has been around for so long, even if Glow Squid is about to be released.

Affects 21w05a.
Can confirm in 21w05b.
Can confirm in 21w08b. I've attached an updated video.

In 21w13a

Confirmed for 21w14a

In 21w15a

Affects 21w17a

In 21w18a

Can confirm in 21w40a.

Also happens in 1.18 Pre 6

Still in 22w05a
Can confirm in 1.18.2.
Can confirm in 22w17a.

can confirm for 1.18.1

Can confirm in 1.19.4 Pre-release 1.

Confirmed in 1.19.4 Pre-release 3. Very frustrating when trying to rescue a stranded squid.

Can confirm in 1.20.5.
Cannot be reproduced in 24w18a.
[media][media]
It's still there in 24w18a but a bit more difficult to see. A higher than normal tickrate makes it easy to reproduce:
[media]
Just want to add the word rubberband or rubberbanding to describe the behavior