[Mac] Problem with resolving fully quailfied host names in URL

Photoshop
,
1

Hi,

we found that there is problem to connect from our UXP plugin on MacOS to a remote server if a fully qualified name is used in a URL.
The only way is currently the pure host name “host” instead of “host.my-domain.com”
This limits the user to have the server inside his own network.
For remote server I found a workaround by adding the IP address and a single hostname into /private/etc/hosts.

Under Windows the UXP plugin can handle urls with and without domain names, as expected.

But under Mac I see only:

index.js:2705 TypeError: Network request failed
     at z.o.onerror (uxp://uxp-internal/netjs_scripts.js:2)
     at z.m (uxp://uxp-internal/domjs_scripts.js:2)
     at uxp://uxp-internal/domjs_scripts.js:2
     at Object.runWithNativeHandler (<anonymous>)
     at L (uxp://uxp-internal/domjs_scripts.js:2)
     at uxp://uxp-internal/domjs_scripts.js:2
     at D (uxp://uxp-internal/domjs_scripts.js:2)
     at P (uxp://uxp-internal/domjs_scripts.js:2)
     at i (uxp://uxp-internal/netjs_scripts.js:2)

when using fetch().

Any clues for that?
Is the character ‘.’ on macOS coded differently? Or must it extra escaped?