Cedar Creek Lake Map on Lake Insight but not Navionics

I have emailed Navionics about this but they don't seem to want to help. Can anyone tell my why Lake Insight can acquire the lake map soundings for Cedar Creek but Navionics doesn't even show a body of water being present? The lake has existed for 14 years now, and nothing shows up on my Navionics+ Platinum chip and I have updated the chip and emailed Navionics about it, with not much of a response. Even my Garmin road GPS shows at least a body of water being there....