Having a seemingly strange problem:

• Assemblies with a large number of mates seem to have the mates "blow up" at random times
• Assemblies saved with no mate errors suddenly show mate errors upon opening/
• Open an assembly that shows a ton of mate errors, fix one mate and mate errors go away.  CTRL-Q and they are back
• Repair all of the broken mates and save.  Re-Open assembly, mates show as unsolvable.  CTRL-Q fixes.
• Assemblies with flexible mates show errors on open.  CTRL-Q fixes them

No top down references

No circular references

SolidWorks 2014 SP5 x64

Anybody else experiencing weird mate solving issues?