Agent subnet is undeletable

[gukoff]

When a network-isolated AI Foundry is deleted, it leaves the agent subnet with a non-deletable serviceAssociationLink.
Attempting to delete it results it the following error:

Failed to delete subnet 'agent-subnet'. Error: Subnet agent-subnet is in use by /subscriptions/xxx/resourceGroups/rg-xxx/providers/Microsoft.Network/virtualNetworks/vnet-xxx/subnets/agent-subnet/serviceAssociationLinks/legionservicelink and cannot be deleted. In order to delete the subnet, delete all the resources within the subnet. See aka.ms/deletesubnet.

Same issue was also discussed on Microsoft Q&A, with a suggestion that one must contact support to delete the subnet.

Is this bug also on the radar in AI Foundry? (: