I’m not aware of any issues. Do you have many auto coupons by any chance?

Or if you don’t use the auto coupon feature at all, does disabling WJECF_AutoCoupon fix the memory issue?

Alternatively, what if you append the following line before line 43: if ( $object instanceof WC_Coupon ) ?

$this->wrappers = array();

Does that solve the memory issue?

…I have been thinking about dropping WC2 support but haven’t made up my mind yet.