Portal 2 Bug: Gel flow ignores `prop_tractor_beam` intersection after placing the portal again

[LambdaCore21]

Describe the bug

Gel flow ignores funnel intersection after placing the portal again. It changes its behaviour:

https://github.com/StrataSource/Engine/assets/63379443/c669bbb8-d563-4907-b105-bbc92d01a065

To Reproduce

Watch the video or try it in PeTI

Issue Map

Not needed

Expected Behavior

The behaviour of stuff should always be the same at the funnel intersection

Operating System

No response