The bug
When in survival mode, while climbing ladders or vines, eating food will not slow you down.
Related issues
is duplicated by
Attachments
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Same for charging bows and swimming up.
Still in 13w25c
Confirmed in 14w11b.

Is this still a concern in the current Minecraft version 1.8.1 Prerelease 3 / Launcher version 1.5.3 or later? If so, please update the affected versions in order to best aid Mojang ensuring bugs are still valid in the latest releases/pre-releases.
No response for over a year.

Reopening this based on MC-152257.
Affects all 1.14 snapshots, and all 1.14.2 snapshots
(honestly if it affects all of these versions i would say it hasn't been fixed in any but that's not proven yet)
affects 20w18a
someone plz work on this
also using a shield
still in 20w19a
Still in 20w30a
Can confirm in 20w51a.
Can confirm in 21w03a.
Can confirm in 21w05b.
Can confirm in 21w06a.
Can confirm in 21w07a.
I've attached an example video.
still in 21w08a
Can someone plz fix this
Can confirm in 21w11a. @unknown, please be patient when waiting for Mojang to fix issues. When the time is appropriate, they will take action.
May relate to MC-152728.
Can confirm in 21w15a.
Can confirm in 21w17a.
Can confirm in 1.17.
Can confirm in 1.17.1.

Can confirm for 22w11a.
Can confirm in 1.19.
Can confirm in 1.19.2.
Can confirm in 1.19.3.