just for the record (I assume your issue has been dealt with)
I have been looking extensively for a HR-V CVT, and had my old garage check an available car on quality and maintenance. During the test drive I experienced similar issues, driving away from a standstill gave a shutter, which indicates an issue with a neglected recall for these series. At least the CVT should be rinsed, and oil replaced according to manual. From factory they had used wrong oil, and therefore recall was issued. And they extended the warrenty up to 10 years.
So please check if recall has been performed on your car!
Other than that, maybe regular wear and tear? 185000 is quite a mileage but shouldn't be an issue.
Good luck!