Always returns some valid results even on UNKNOWN LOCATION

[gaamaaresosa]

Testing Unknow location: CKSHJFYHSDFASF
https://wttr.in/CKSHJFYHSDFASF?format=%t|%C

Result:
+30°C|Light rain shower

Expected:
404 UNKNOWN LOCATION: CKSHJFYHSDFASF

But if I try without any parameter like below, I see expected result.
https://wttr.in/CKSHJFYHSDFASF

Result:
404 UNKNOWN LOCATION: CKSHJFYHSDFASF

Can you please fix this ?
It misguides even if we pass with wrong spelling.