Stack Overflow and FORALL

I have a simulation software that I am part of the development which runs a variety of different model inputs. For one of the model inputs triggers a stackoverflow crash that only occurs in debug mode. Below is what is printed to the command prompt and I have attached an image of what pops up when I run debug within VS. (I apologize for deleting the information pertaining the specific files.)

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forrtl: severe (170): Program Exception - stack overflow

Image              PC           Routine    Line      Source

PROG_Debug   0000000141A3CB77 

PROG_Debug   00000001405ED7D0 

PROG_Debug   00000001400C4C4A

PROG_Debug   0000000141815D36 

PROG_Debug   0000000141ABA386  Unknown      Unknown  Unknown

PROG_Debug   0000000141A3D1FC  Unknown      Unknown  Unknown

PROG_Debug   0000000141A3D33E  Unknown      Unknown  Unknown

kernel32.dll 00000000770959ED  Unknown      Unknown  Unknown

ntdll.dll    00000000771CC541  Unknown      Unknown  Unknown

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Looking at the line numbers for the code it crashes on the following FORALL statement

         FORALL(I=1:NROW,J=1:NCOL,K=1:NLAY,ILOC(J,I,K).NE.0)
     +     BUFF(J,I,K)=BUFF(J,I,K)/( DR(J)*DC(I)*(BTM(J,I,LM(K)-1)-BTM(J,I,LM(K))) )

(Note that in this run NROW=150, NCOL=150, NLAY=6, so they are not big arrays and the LM index pointer array is correct)

The indexing is fine and all the variables are fine (used in other parts of the code). When I run the code on release it does not crash, but the variable BUFF is dumped to a file after that FORALL, but that happens as if the FORALL acts like a RETURN statement.

When I change the FORALL to a DO CONCURRENT as follows:

         DO CONCURRENT (I=1:NROW,J=1:NCOL,K=1:NLAY,ILOC(J,I,K).NE.0)
          BUFF(J,I,K)=BUFF(J,I,K)/( DR(J)*DC(I)*(BTM(J,I,LM(K)-1)-BTM(J,I,LM(K))) )
         END DO

The code in debug mode behaves as expected. Is this a bug, or am I missing something with regards to FORALL statements. Should I go through my code and clean out the FORALL in favor of DO CONCURRENT.

Thanks as always.