It is "normal," but not for Sonar. I've also had a number of dump crashes (where Sonar just unloads and shuts down without warning).
IRIS2 is fine as a standalone in both 32-bit and 64-bit, but in Sonar, it's discouraging. I'll just have to wait for updates...in the meantime, time for a roll-back (and TY Cakewalk for making rollbacks so easy in Control Center...just right click on the product and select the version to revert to...fantastic!).
UPDATE: Rolled back to Jamaica Plain...all problems with loading VST's, weird sounds (screeching from IRIS et al) are gone. The Plain in Jamaica stays mainly in the...er....nevermind. Not going to be visiting Kingston again until there's a fix. That was grim. AND it happens to everyone.