Some events are missed when chained

[clemlesne]

Describe the bug:

When chaining events, some are missed.

It is notably often when:

• User opens multiple tabs in a short time (multiple /sec)
• User navigates across multiple pages quickly (3-10 secs /page) which are all using chained events

To reproduce:

I didn't yet have a reproduction.

Expected behavior:

Events are properly loading.

Specifics:

• Python Version: 3.13
• Reflex Version: 0.6.8
• OS: Alpine Linux 3.21
• Browser (Optional): Safari 18.3 (20620.2.4.11.5)

Related:

• Some events are missed when multiple handlers are chained using yield #1309
• Event handler chaining is non-deterministic. #1422

[linear]

ENG-4568 Some events are missed when chained