Put some animals (e.g. cows/sheeps) into water wich is at the same level as the surface, no matter how deep the water actually is.
Try to attract them with food (wheat in this example).
They can not get out of water. They don't "jump" anymore while in water, they just float.
Seems this is caused by previous fix of MC-134755
P.S. Also don't know whether to consider it a bug, but you can not now breed a stack of cows in one cell since they don't pop, which has always been used in cow-farms (+cookers).
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Confirmed for 1.14 Pre-Release 2
Try spawning some illagers and a ravager in the water; they swim with their head!

So this means that my problem ( MC-147905 ) Is not corrected? or does this fix it? I will test soon.

This is not resolved in 1.14-Pre3. Animals that are alone in a 1x1 block will jump (cow in picture below), however, if there are multiple animals in a 1x1 cell the animals will not jump (pigs in picture). Please re-open the issue.
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@Quinn Haven't tested with pigs, but multiple cows can successully be fed in 1x1 cell in water.
UPD: Could successfully feed multiple pigs in 1x1 water cell (either in water-source block, or in a stream as in your screenshot), so seems you are doing something wrong.
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It seems I'm only able to feed a maximum of 3 pigs (and cows) in a 1x1 cell (with and without water) even if more than 3 exist as their bounding boxes all overlap with each other. To get 3 I have to turn on the bounding boxes and click the edges of the boxes to get some outliers. Not sure how you were able to get multiple to be fed, I tried both shifting and not shifting with no change. This is why they had to 'bob' up and down in water (the main bug for this thread), which doesn't appear to be fixed if more than 1 animal is in the same square. This issue is fixed if a single animal is in a cell, but multiple in a 1x1 square will not jump.
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Bobbing issue is still present in 1.14.4 despite being marked as fixed.

Can confirm this is still an issue for both pigs and cows in 1.14.4... is this WAI?