CONTAP-273054: FlexCache 1st constituent has a higher space utilization

Issue

The first constituent in a FlexCache has a much higher space util than its peer constituents, since it has more reserved space.
cluster::> df flexcache*
Filesystem kbytes used avail capacity Mounted on
/vol/flexcache__0001/ 1006632960 922326676 84306284 92% /vol/flexcache__0001/ <<<<
/vol/flexcache__0002/ 1006632960 295812832 710820128 29% /vol/flexcache__0002/
/vol/flexcache__0003/ 1006632960 291351224 715281736 29% /vol/flexcache__0003/
/vol/flexcache__0004/ 1006632960 303965580 702667380 30% /vol/flexcache__0004/
/vol/flexcache__0005/ 1006632960 298117568 708515392 30% /vol/flexcache__0005/
/vol/flexcache__0006/ 1006632960 305151152 701481808 30% /vol/flexcache__0006/
/vol/flexcache__0007/ 1006632960 298327188 708305772 30% /vol/flexcache__0007/
/vol/flexcache__0008/ 1006632960 305645840 700987120 30% /vol/flexcache__0008/
Note: CV 0001 has a 92% space util, the rest CVs are only at 30%

cluster::> df -R flexcache*
Filesystem kbytes used avail reserved Mounted on
/vol/flexcache__0001/ 1006632960 922326676 84306284 (451289664) /vol/flexcache__0001/
/vol/flexcache__0002/ 1006632960 295812840 710820120 (141277384) /vol/flexcache__0002/
/vol/flexcache__0003/ 1006632960 291351224 715281736 (139180344) /vol/flexcache__0003/
/vol/flexcache__0004/ 1006632960 303965580 702667380 (143898784) /vol/flexcache__0004/
/vol/flexcache__0005/ 1006632960 298117568 708515392 (142326144) /vol/flexcache__0005/
/vol/flexcache__0006/ 1006632960 305151152 701481808 (145471384) /vol/flexcache__0006/
/vol/flexcache__0007/ 1006632960 298327188 708305772 (142589104) /vol/flexcache__0007/
/vol/flexcache__0008/ 1006632960 305645840 700987120 (141277864) /vol/flexcache__0008/
Note: CV 0001 has much more space reserved, compared to its peers