1. Right, this has nothing to do with CAN-Do, or even the SOC-Meter (except that it displays the LEAF's internal "GID" value read from the EV-CAN bus).
2. Known Behavior: Even if the GIDs did not change, it is normal to "lose a Bar" when restarting the LEAF. When driving (battery decreasing) if one gets into the bottom half of a Bar, the Bar still shows (until the Bar is "empty"). However, when Charging (or Regen, battery increasing), a Bar does not come on until it is over half full.
When turning the LEAF ON, the Bars behave as if they are being "filled", so a 10.3 Bars will only show 10 bars, not the 11 Bars that was being displayed when driving previously.
3. New Info: I believe that this is the first report of repeated OFF/ON cycles losing multiple GIDs during several cycles. Apparently there are some "estimations" and "corrections" going on, where the internal Energy "estimates" (present level and capacity) are being "corrected".
4. Remember, even with an "old" reduced-capacity Pack (like 86% of new capacity), the LEAF would show 12 "fuel" Bars after a "full" charge (rather misleading), AND still show 12 Capacity Bars (also somewhat misleading), but we think that GIDs would show something near 86%, which might actually be useful.
5. We think that for the more extreme 50% case mentioned above, 12 "fuel" bars would show (when "full"), but GIDs would show about 50% (of 281). The Capacity Bars would (should) show this extreme loss, in some manner.