RMS SO POS memory leak

Hi there 

We are having an issue with RMS POS having a memory leak.  We are seeing this in a multi site environment but only at 20% of store locations.  

SO POS will will start from using around 50MB RAM and then increase well over 1GB RAM.   See attached video.  This would cause RMS to crash and not post transactions or print receipts.

Even after deleting all the hooks and disabling any third party applications the issue still persists.

This has only started happening recently.

Any ideas as to what could be causing this.