Rooms disappear during flyby sequences (regression)

[Stranger1992]

Version 1.7.2: In the below setup, during the flyby sequence: the top room (coloured blue) will disappear as a flyby camera crosses the portal to the room below (in green)

Video on Discord: https://cdn.discordapp.com/attachments/1073914803711660112/1300786012032729138/2024-10-29_11-37-35.mp4?ex=67221ae0&is=6720c960&hm=0efeb0211dac01f883415ba4e370fe1c7deb82714d262683263eb20fa6926b70&

Version 1.6.9: This does not happen.

Video on discord: https://discord.com/channels/1072511394735464498/1073914803711660112/1300798266073546835

Download :

https://tombengine.com/QA/TEN%20QA%20Testing/Issue%20927%20Portals/%23927%20Room%20Portal%20Error.zip

Download includes 2 .ten files. Rename Collision_169 for the same room setup built in TE 1.6.9

[Stranger1992]

Tested with older versions:

Bug present in 1.7.1 too. Not present in 1.7.0

[Lwmte]

This bug occurs if flyby path is bent in such a way, that it goes out of bounds, where previous and next camera are placed. Engine struggles to detect proper room number. Fixed by brute-forcing search for room number in 3D space in such ambiguous cases.

[Lwmte]

I am reopening this issue until the root cause is identified.