Were you in your suite in the late morning? They usually assume that that's the time tourists are most likely to be out about town, so they try to cram every type of cleaning and maintenance into that period. And they therefore schedule check-out + check-in times around that time, so at least some percentage of suites will be "between guests" at that time and get deep-cleaned.

I travel a lot and hadn't had that experience, but I usually don't book suites that nice