Unknown error when sending command to RM4 via Script

Configuration
1

I set up the RM4, unlocked it, was able to get it to learn two commands. However when I create a script and try to test it, I get “Unknown Error”.

Here’s my script:

action: remote.send_command
target:
  device_id: da424af60ea0751196d66c681241acdb
data:
  device: sunsa
  command: lower_shades

I basically created two commands, one is lower_shades the other is open_shades and had the Remote learn them via Actions.

How can I dig deeper to figure out what is erroring out? HA sees the remote, it clearly works otherwise I wouldn’t have been able to send the learn commands successfully. Just stuck on this last step.

EDIT: Interestingly, I dug in the .storage and found the learned commands, I was only able to find one. Which is why the command I was sending was erroring out. It seems the other two for one reason or another are not “learnable”? I have tried learning the down and up buttons but not having any luck. Is it possible for some buttons to be learnable on 433 but not others?