The SOH definitely fluctuates a bit, don't worry about that. It's a more useful stat for longer term trends. Personally, I only check the SOH once a year or so. It's important to realize that, as long as you don't abuse the battery pack with poor charging habits, the battery's health is what it is - there's no sense in worrying about it.
There are definitely 2017 LEAFs in Seattle that have 12 bars still, but those will almost certainly be dropping to 11 bars this year. Having an SOH of 86% is an outlier for a 2017, not the norm for most climates.
Vancouver, CA owner of a 2013 Ocean Blue SV + QC, purchased 01/2017 in WA
Zencar 12/20/24/30A L1/L2 portable EVSE
1-1/4" Curt #11396 hitch
After market, DIY LED DRLs
LeafSpy Pro + Konnwei KW902 ELM327 BT OBDII dongle
Loving my first BEV