Free42, DM42 - hard crash

[Gjermund Skailand]

It seems I have found a serious bug, I cannot find that this has been reported.
Would someone dare to confirm the below?
If you want to test this, note that it causes a hard crash and you will loose memory as it resets to last saved state
on a fresh state (or not if you don't care):
Enable Dynamic Stack extension (NSTK),
set the calculator in NSTK mode

write the small program
00 { 17- Byte Prgm }
01 LBL "Crash"
02 FUNC 11
03 L4STK
04 RTNERR 5
05 .END.

Free42 crashes
DM 42 result in a Hard Fault, upon EXIT resets to old saved state

My versions:
Free42 on Samsung phone: 3.0.18
DM42: DMCP v 3.24 (IFC 03.15) BASE , DM42 v3.22 Free42 3.0.15

Which is kind of ironic, since the above is to safeguard for bad data
Best regards Gjermund