Before version 1.3 player icons on maps updated very frequently (most notably when rotating and holding the map). However, since then they update less frequently, resulting in a perceived laggy behavior.
Steps to Reproduce:
Get an empty map item
Use the map, so that the player icon is visible
Move or rotate the player around
Observed Behavior:
The player icon will look very choppy and stutter when it updates.
Expected Behavior:
The map icon would consistently and clearly update, so that the player is constantly aware of their position on the map, and does not need to stop moving to ensure the map icon properly and entirely represents their position.
Screenshots/Videos:
Prior to 1.3:
[media]
Now:
[media]
Notes:
May relate to other map icon issues: MC-148332 MC-142687 MC-269713
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Can confirm
I'd like to request ownership of this issue.

Possibly duplicates MC-237239?

Thank you for your report!
After consideration, the issue is being closed as Working as Intended.
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Things such as graphics, sounds, world creation, biomes, redstone, villagers, and animals may not work the same in current versions.
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