The info is coming from a source that works for Access. That's all I can disclose. Take it as you like, however, a pretty large run of TIs had manufacturing deficiencies. If your TI is trouble-free, it is probably because you either

A) Have not pushed your synth to where it would cause a problem

B) Got a later bach that may have had an improved system board

C) Not aware of the issue(s)

Here, try this:

Try setting up multi patch with 4 or so patches with say 2 patches with arp pattern - say, 1 patch would be your kick drum and another one is an arp bassline. Now, try playing around with this patch - do you hear any artifacts? Can you hear pops/clicks/glitches?

Same patch - save it. Now, go to single patches or better yet - turn off your synth, turn it back on (unplug). Go back to multi you created - do arp patterns remain or are they now gone? Does it still sound the same?

Still, same patch - try hitting 2 adjacent notes together - do notes get stuck?

Just some things to try.

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