java/awt/FontClass/CreateFont/DeleteFont.sh is unstable

Additional info:
Windows 10 Pro, 64 bit

Tested on
JDK15 build 14

Testcase java/awt/FontClass/CreateFont/DeleteFont.sh is failing intermittently on windows OS.

----------messages:(4/212)*----------
JDK under test: C:\\swingsanity\\testjdk\\jdk-15
java version "15-ea" 2020-09-15
Java(TM) SE Runtime Environment (build 15-ea+14-561)
Java HotSpot(TM) 64-Bit Server VM (build 15-ea+14-561, mixed mode, sharing)

#section:shell
----------messages:(3/129)----------
command: shell DeleteFont.sh
reason: Assumed action based on file name: run shell DeleteFont.sh
elapsed time (seconds): 1.36
----------System.out:(9/452)*----------
TESTJAVA=C:/swingsanity/testjdk/jdk-15
TESTSRC=C:/swingsanity/testbase/15/ws/open/test/jdk/java/awt/FontClass/CreateFont
TESTCLASSES=C:/swingsanity/results/run_39/jdk_desktop/JTwork/classes/java/awt/FontClass/CreateFont/DeleteFont.d
Using font file: C:/swingsanity/testbase/15/ws/open/test/jdk/java/awt/FontClass/CreateFont\\A.ttf
Test fails: tmp file exists!
+~JF1296388559019578981.tmp
DeleteFont$1.class
DeleteFont$2.class
DeleteFont.class
----------System.err:(0/0)----------



test result: Failed. Execution failed: exit code 1