Snippet with conditional transition is not working

[TUTOR03]

Describe the bug

For example you have a snippet accepting some boolean value as prop and showing content if this prop is true. Content inside snippet has transition on it. Also the snippet is rendered based on some condition in the parent component.
Even the prop you pass to snippet is alway true, the transition does not happen.

Reproduction

Check this playground reproduction

2025-02-11.16-18-07.mp4

https://svelte.dev/playground/hello-world?version=5.19.9#H4sIAAAAAAAAA31QTU_DMAz9K16GtFWaKELiUtoKbnDnRjl0jTsiMqdKvA0U5b-jpIUVgbjFz-8r9oLaPYpCPKDWBk7GaglrlIpRZmIjeqXRieLZC_4YIi8CYvOluh-GS3dEzRHbtg7_wjtDjMROFKJ0nVUD1w0BqP1gLIOHvpUIAXpr9rAaVTnblpxiZWh121DDGhncqzlBBReOW8Z132qH2Xz3SIT2N6HMv0Mb8ktHahiQQUX2OuqyEF38UvXJJk0Nl1Id4VyjiC0r7-XBtmmG65urEOqR3HC636TMpTqmhc9VHxry-RQaxgo_g_ydRZJoZ43ST7KkTAYRK8BPonJr83oEE3HapPd5XW4PzIbAUKdV91b5dVbV0wkXyal-MrudxtSlzEf6f8Kv-y7OaXOLhMx8xEYwvrMo2B4wvIRPdZI9WmsCAAA=

Logs

System Info

-

Severity

annoyance

[machak]

related to #14792 #14796 ?

[TUTOR03]

Seems so. Maybe will be fixed in #14796

[gyzerok]

Don't think they are related, since animate and transition are different things

[adiguba]

Hello,

This is normal : transition are local by default, and run only on their block, not parents :

https://svelte.dev/docs/svelte/transition#Local-vs-global

[Conduitry]

Yup, this is working just how other transitions inside nested conditional blocks work, and can be controlled with the |global flag on the transition.