Siri Won't run a particular shortcut on the watch

Hi,

I've asked this question of Apple support, but I've had no reply so far.

I wonder if someone with an Apple Watch could confirm if the bug I am seeing is specific to me or a general issue.

I'm trying to create a Siri shortcut to switch watch faces, but it won't run.

Steps to reproduce: 

1. Create two shortcuts on the iPhone 
   1. 1st one turns the torch on on the watch - watch/torch (call it "Test One")
   2. 2nd one selects one of your watch faces - watch/watch-face  (call it "Test Two")
   3. Set security to allow both shortcuts to show on watch 
2. Both run OK on the iPhone (but cause actions on the watch) 
3. Both run OK on the watch 
4. Both run OK using iPhone-Siri prompts (say "Test One" or "Test Two")
5. Only the 1st one runs using Watch-Siri prompts - i.e. invoke Siri on the Watch & say "Test One" or "Test Two" . Second one just hangs.

I'd be grateful if someone could test for me.

Thanks , Bill