I see this tread was started in March with zero replies. Is this forum still very active? It was years ago.
I have used J River since the early days. I use it to manage my music library. I've bought new versions multiple times but had not upgraded in a while. I paid for an MC 27 upgrade because I wanted to try Cloudplay, in particular in conjunction with Play Doctor.
I am having a similar issue. It seems random. About every 4th or 5th try Play Doctor will pull files from Cloudplay. The rest of the time I only get results from my local library. I can enter the exact same artist and get several times local only, then suddenly get files from Cloudplay, so it doesn't seem to be related to the search criteria that is used.
Cloudplay has been talked up for a while in J River emails ... I see it was recently part of the advertisement to upgrade to MC 28. If it's going to be listed as a key feature, hopefully the moderators will respond and help get the basics working.
Library
Total files: 38,304
Audio files: 12,004
Image files: 25,610
Video files: 690
Other files: 0
Artists: 1,950
Albums: 1,019
Genres: 32
Years: 56
Playlists: 63
Processing
Thumbnails built: 100% (38304 of 38304)
Audio analyzed (audio files): 100% (12004 of 12004)
Audio analyzed (video files): 0% (0 of 690)
Background Tools Running
No tools currently running
Power
Playback (disable automatic sleep)
Drive Info
Time for 256 MB file on library drive (C:) to make / read: 0.783 / 0.491 seconds
Time for 256 MB file on rip drive (M:) to make / read: 1.757 / 1.338 seconds
Media Center
Version: 27.0.85 Registered
Install path: C:\Program Files (x86)\J River\Media Center 27\
Interface plug-ins: Interface Plugins: TiVo Server (not running)
JRMark: 4638 (version 20.0.132)
Program run time: 20 minutes
Memory used: 72.3 MB memory
Handles used: 799 handles
Advanced System Info
Memory & CPU
CPU features: MMX, SSE2, SSE3, SSSE3, SSE4.1, AVX
Free Physical Memory: 21.1 GB
Total Logical Cores: 4
Total Memory: 23.9 GB
Operating System
Microsoft Windows 10 64-bit
Audio inputs and outputs
DENON-AVR (NVIDIA High Definition Audio) (driver 10.0.19041.1)
Realtek Digital Output (Realtek High Definition Audio) (driver 10.0.19041.1)