I have this problem aswell, is there a solution for this yet?
CloudDrive.Service.exe Warning 0 [Store] Event ItemChanged took too long (00:00:01.0165210) on IoThreadPerformanceInfo. 2019-09-01 17:36:15Z 7916292134
CloudDrive.Service.exe Warning 0 [Store] Event ItemChanged took too long (00:00:01.1847340) on IoThreadPerformanceInfo. 2019-09-01 17:36:39Z 8003805219
CloudDrive.Service.exe Warning 0 [Store] Event ItemChanged took too long (00:00:01.3078603) on IoThreadPerformanceInfo. 2019-09-01 17:36:42Z 8013835906
CloudDrive.Service.exe Warning 0 [Store] Event ItemChanged took too long (00:00:01.9881820) on IoRequestInfo. 2019-09-01 17:37:02Z 8083874921
CloudDrive.Service.exe Warning 0 [Store] Event ItemChanged took too long (00:00:01.0480161) on IoRequestInfo. 2019-09-01 17:37:13Z 8122855338
CloudDrive.Service.exe Warning 0 [Store] Event ItemChanged took too long (00:00:01.3294379) on CloudDriveInfo. 2019-09-01 17:37:25Z 8167701103
CloudDrive.Service.exe Warning 0 [Store] Event ItemChanged took too long (00:00:01.1115666) on IoRequestInfo. 2019-09-01 17:37:26Z 8170550942
CloudDrive.Service.exe Warning 0 [Store] Event ItemChanged took too long (00:00:01.1471438) on DiskStatisticsInfo. 2019-09-01 17:37:27Z 8172464059
CloudDrive.Service.exe Warning 0 [Store] Event ItemChanged took too long (00:00:01.1527501) on IoRequestInfo. 2019-09-01 17:37:39Z 8215453006
CloudDrive.Service.exe Warning 0 [Store] Event ItemChanged took too long (00:00:01.0765116) on IoThreadPerformanceInfo. 2019-09-01 17:37:40Z 8221837170
CloudDrive.Service.exe Warning 0 [Store] Event ItemChanged took too long (00:00:01.0405752) on IoRequestInfo. 2019-09-01 17:37:54Z 8269895364
CloudDrive.Service.exe Warning 0 [Store] Event ItemChanged took too long (00:00:01.5499587) on DiskStatisticsInfo. 2019-09-01 17:37:56Z 8279541805
CloudDrive.Service.exe Warning 0 [Store] Event ItemChanged took too long (00:00:01.0258108) on IoRequestInfo. 2019-09-01 17:38:01Z 8295326544
CloudDrive.Service.exe Warning 0 [Store] Event ItemChanged took too long (00:00:01.0225525) on IoRequestInfo. 2019-09-01 17:38:01Z 8295459021
CloudDrive.Service.exe Warning 0 [Store] Event ItemRemoved took too long (00:00:01.1142312) on IoRequestInfo. 2019-09-01 17:38:06Z 8314575764
CloudDrive.Service.exe Warning 0 [Store] Event ItemChanged took too long (00:00:01.3861471) on IoRequestInfo. 2019-09-01 17:38:11Z 8332095410
CloudDrive.Service.exe Warning 0 [Store] Event ItemChanged took too long (00:00:01.1822438) on DiskStatisticsInfo. 2019-09-01 17:38:11Z 8333003560
The CPU usage is also very high...