ADDITIONAL SYSTEM INFORMATION :
Windows 11

A DESCRIPTION OF THE PROBLEM :
For some of JFR profiles (recorded via jcmd <pid> JFR.start) in "(Legacy) Threads" view - when I click on some thread, JMC shows stack traces for this thread for a few milliseconds and then hides them.

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
Run some long-running CPU-consuming Java application
Record JFR profile via 'jcmd <pid> JFR.start name=myapp filename=/tmp/myapp_perf.jfr duration=3m'
Wait 3 minutes
Open recorded profile in JMC UI
Open "(Legacy) Threads" view
Click on different threads there

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
JMC show stack traces of selected thread in the "Stack Trace" window
ACTUAL -
JMC shows stack traces for this thread for a few milliseconds and then hides them

CUSTOMER SUBMITTED WORKAROUND :
Use another tool to parse JFR file

FREQUENCY : always