Wall-ceiling angled panels cause leak

[ivan-m-chas]

BEE2 Application Version

4.43.0 64bit

BEE2 Package Version

4.43.0

What operating system are you running on?

Windows 10 (64bit)

Description of the bug

Angled panel on wall flush with ceiling (any angle) causes leak to happen

Expected behavior

No leak happens

Steps to reproduce

Step 1. Start new test chamber.
Step 2. Put angled panel (any angle) on a wall flush with ceiling (or on ceiling flush with a wall).
Step 3. Build the test chamber. There will be a leak.

Logs and Reports

[PORTAL2 PUZZLEMAKER]  CVoxelTestChamber::Export VMF C:/Program Files (x86)/Steam/steamapps/common/Portal 2/sdk_content\maps/preview.vmf ...
[PORTAL2 PUZZLEMAKER]  CVoxelTestChamber::Export VMF success, chamber size: (8,6,4)
[PORTAL2 PUZZLEMAKER]  Compilation time (after export): 44 (ms)
[PORTAL2 PUZZLEMAKER]  Saved puzzle: C:/Program Files (x86)/Steam/steamapps/common/Portal 2/portal2/puzzles\76561198087794102\autosave.p2c
[PORTAL2 PUZZLEMAKER]  Compilation time (after VBSP): 5348 (ms)
[PORTAL2 PUZZLEMAKER]  Compilation time (after VVIS): 5526 (ms)
[PORTAL2 PUZZLEMAKER]  Compilation time (after VRAD): 9557 (ms)
[PORTAL2 PUZZLEMAKER]  Compilation time (complete): 9570 (ms) ...launching map!
Error: Operator stop_entry, unknown sound operator attribute input_start
---- Host_Changelevel ----
exec: couldn't exec skill1.cfg
==== calling mapspawn.nut
Commentary: Could not find commentary data file 'maps/puzzlemaker/preview_commentary.txt'. 
Can't find factory for entity: wearable_item
NULL Ent in UTIL_PrecacheOther
[PORTAL2 PUZZLEMAKER]  --------START loading assets--------

[PORTAL2 PUZZLEMAKER]  ---------END loading assets---------

==== calling mapspawn.nut
Unknown command "cl_puzzlemaker_start_previewing"
***********************************
*         NO GAME SESSION         *
* some features might be disabled *
* (achievements, stats, UI, etc.) *
***********************************
Redownloading all lightmaps
Unknown command "cl_puzzlemaker_start_editing"

Additional information

I'm using clean style.