Hi EMP – sorry you are having trouble.
Can you confirm that the problem occurs only on specific reverbs (please give the numbers) and only on DSP A ? If this is the case, suggest you put these reverbs on DSP B.
The chips are not made any more and are very hard to find. But, you have been suffering for a long time so we would like to help you. You would have to return your unit to Eventide in the US. Would you want to do this ? If so, please contact firstname.lastname@example.org, referring to this post.