He hasn't repopped since and it has rained and stopped numerous times.
No ones said anything about him popping anywhere else, so I'm assuming he does it once per day? I'm at Horizon every day and this is the first time I've seen him here, but ofc we've seen him in Uldah too.

Theres no music in Uldah or Thanalan currently. Dont know about other areas as I dont go to them often.