Fold to river bet, leak?

[MrEngenic]

Some of my stats:
sample size 110k 5/10 and 10/20
1.0 bb/100

30/20/2.3
on streets
2.8/2.3/1.8

steal 37%, defend bb 50%
wtsd 35%
wonatsd 55%

my fold to river bet is 40 %, much higher than most. Is this way too high?
I check behind the turn more often than most and call the river if no draws get there. Maybe this is a leak.


I raise AdKd in hijack, BB calls

flop 8s9sJh
he check/calls

turn 2c
i usually check behind and fold river to a 7, T, Q or an non A or K spade. Reads are important, but I very rarely bet/call down.