Unexpected flows from T21 to T44 for FIP Address

Overview:
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I observed that incorrect flows exist in T21 redirecting ping to VM FIP to T44 instead of T25

Investigation result:
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The FIP address was previously assigned to the router (gateway interface) and, it looks like, that some data remains or is incorrectly restored in T21 like this IP is still the router interface even if now it's a VM FIP

Reproduction steps:
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1) Create a router and set its gateway interface
2) Check T21 flows
3) Delete router
4) Create router again
5) Check T21 flows

Expected:
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• In T21 only the router external interface is redirected to T44

Actual:
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• Also another IPs have flows which redirect them to T44