I am using ioni3 my *ngswitchcase is not working properly

Ionic Framework ionic-v3
1

Hello everyone
whenever i am using hardcoded switch cases it works fine
hardcoded
But when i try to make the segments in *ngfor loop then it’s not working and match value with switch case

loop
loop.png784×58 6.24 KB

Please advice me what to do .
Best Regards
Hamza