When using a pre-order app together with a subscription app, an issue occurs where the subscription app's widget is displayed on pre-order products.
We have improved this issue so that it no longer occurs with the subscription app "定期購買" (Teiki Kobai).
Stores using "定期購買" (Teiki Kobai), can now run pre-orders without needing to apply the workaround described in the reference page below!
Reference page: Can I use it together with a subscription app? | RuffRuff 予約販売 Help Center
* Interference issues still occur with subscription apps other than "定期購買" (Teiki Kobai), so please apply the workaround described in the reference page above.