When trying to move an app, there is an error: "could not remount /system"
logcat:
01-05 21:35:55.982 23781 23781 W .systemappmover: type=1400 audit(0.0:149): avc: denied { read } for name="RootToolsMounts" dev="dm-0" ino=654083 scontext=u:r:untrusted_app:s0:c512,c768 tcontext=u:object_r:system_data_file:s0 tclass=file permissive=0
(sorry - accidentally clicked enter on the original report with only the title)