Dynamics AX 2012 R3 CU13 client stop working Crashing

Dynamics AX 2012 R3 Cu13 with 2 AOS. One dedicated to batch.
We have an average of 100 daily users.

For several months now the AX clients of all users have been unexpectedly closed randomly for no apparent reason.
A user can experience 0 or several closures in the same day
The crash can be in the middle of a post, a query, just by having the client open without doing anything, etc.

After spending a long time researching I have not been able to know why.
A few weeks ago I asked Microsoft for support and after reviewing the requested data, including a dump file, the Microsoft technician indicates that the problem is not with AX, that it is with .NET Framework and that I have to open a new support ticket with the .NET Framework department.
We have just changed AX partner and the new one seems to be having trouble opening the support ticket.
While I’m still investigating, but I need someone to help me.
I can’t interpret the analysis of the DUMP file to see what might be happening.

I attach the analysis that I have performed with WinDbg

Please, can you help me?

Thanks in advance

AX Crash Analisys.txt (10.4 KB)