realtime processing Audio Clips can not rename

. Creat Empty Project
. Import Audio File
. Rename it (info line/pool)
it’s OK

.Creat Transpose Track
-Rename it
"could not rename the File!"

.Audio Clip Transpose in infoline
.Vari Audio
.Realtime stretching
all kind of realtime processing cause this issue

weired thing
.Empty transpose track / audio clips global transpose set Independent
.Transepose track set 1 / audio region transpose set -1 = 0 transpose
.Realtime processing audio clip mute(X button)
it can rename.
so I think it is not normal.

I tested 3 versions of Cubase
8.5 / 9 ( 64bit) has this problem
5 (32bit) have no problem