The player cannot use spawn eggs on spawner minecarts to change their respective entity type they summon like normal spawners.
Steps to Reproduce:
Place down a rail block
Fly directly above the rail block
Run the following command:
/summon minecraft:spawner_minecart ~ ~ ~
Right click the spawner minecart with any spawn egg
Observed & Expected Results:
❌ - The player's arm will swing as if they are using the spawn egg item, but nothing will happen to the spawner minecart, and it will remain empty.
✔ - The spawn egg would successfully be used on the spawner minecart, and the entity type would change.
Screenshots/Videos:
[media]
Notes:
This is inconsistent when compared to other spawner blocks such as the monster spawner, or trial spawner.
Linked issues
is duplicated by
Attachments
Comments
Reopening as it works on normal spawners, and thus is expected to also work on spawner minecarts.

20w06a affected
Affects 1.16 Release Candidate 1
Relates to MC-65065
Hi there!
This affects 1.16.1.
Hi there!
This affects 20w27a.
Also affects 1.16.2.
(Wanted spawning blazes.)
Can confirm in 20w51a.
Can confirm in 21w03a.
Can confirm in 21w05b.
Can confirm in 21w06a.
Can confirm in 21w07a.
Can confirm in 21w11a.

Can confirm in 1.16.5
Also, requesting ownership as the current reporter has not updated this report for about 2 years
Can confirm in 21w17a.
Affects 1.17
Affects 21w40a
Can confirm in 1.19.2.

Can confirm in 22w44a, especially noticeable because spawners are now empty by default

Still an issue in 22w46a
Can confirm in 1.20.3. Requesting ownership of this issue as the original poster has been inactive for 3 years.
Can confirm in 1.20.4 Release Candidate 1
Spawner minecart isn’t used in game and probably won’t be used, so mahjong won’t fix that until they remind about this item
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