Parallel delays cause last delay to keep running indefinitely

## Description
When having two parallels paths of 2 delay and a WaitAll Join, one of the delays gets stuck and never finishes.

## Steps to Reproduce
Two paths of each two delay with different short timings (1, 2, 3 and 4 seconds in my case). Joined by a WaitAll Join.

[parallel-delay-bug.json](https://github.com/user-attachments/files/24028071/parallel-delay-bug.json)

## Expected Behavior
I expect both path to complete after the set time and join at the WaitAll join.

## Actual Behavior
The last Delays stays "running" indefinitely, past its set time of e.g. 4 seconds.

## Screenshots

## Environment
- **Elsa Package Version**: Release 3.5.2
- **Operating System**: Windows 11
- **Browser and Version**: Microsoft Edge

Start by importing the attached parallel-delay-bug.json workflow in Elsa 3.5.2 and reproducing it with two parallel paths, each containing two delays and a WaitAll Join. Trace why the final delay remains running beyond its configured time; done means both paths complete and the WaitAll Join finishes as expected.

Written by the indexing model from the issue text.