Remote routes not getting removed and many local routes not appeared in table 21.

Remote routes not getting removed and all local routes not appeared in table 21 after deleting L3VPN

Steps:
1. Create network,subnet,port and boot VM.
2. Create Router and Add all interface to it.
3. Create L3VPN and associate router to it.
4. remove one or 2 subnet from router and re-add again.
5. Delete L3VPN.

Expected Result:
All remote route should be removed and all local routes should appear again.
Result:
Remote routes not removed in table 21 and few local routes not appeared at all.