Current composition placement being cancelled by other HitObjects becoming alive in the editor

[LumpBloom7]

Describe the bug:
After beginning the placement of a HitObject that has a duration, it is possible for the placement to be cancelled by another DHO becoming alive.

This usually results in the placement simply disappearing without a trace, but on occasion a ghost timeline blueprint gets left behind that can't be interacted with in any meaningful manner.

Other objects becoming dead doesn't affect the current placement.

I noticed this while building the editor for sentakki, and was able to replicate in osu!standard. I think I managed to get the same problem in mania, but I can't seem to reproduce it.

Screenshots or videos showing encountered issue:
Note that the placement gets cancelled the same frame as a HitCircle gets retrieved from the pool.
https://www.youtube.com/watch?v=xyYbIJ5SHBI

osu!lazer version:
2021.424.0

Logs:
N/A