Inventory count not updated after Order Fulfillment, Cancellation and Restocked

[abhisek]

SKUs available count is not updated after the following events:-

- Order fulfillment. Ideally, the count should be decreased.

- Order cancellation with restock as True. Ideally, the count should be increased.

- Order reverse fulfillment with disposition as RESTOCKED. Ideally, the count should be increased. Source: https://shopify.dev/docs/apps/build/orders-fulfillment/returns-apps/manage-reverse-deliveries#step-3...

In addition, we didn't receive any response from the webhook (attached to event topic INVENTORY_LEVELS_UPDATE) for the above-mentioned events. 

Looking for urgent help.
Thanks !!