Scrambler 900 Idle Issue

I’ve got a 2017 Triumph Street Scrambler 900 with about 13,000 miles on it. I’ve ridden it from Portland to Phoenix and then Phoenix to Seattle - beautiful bike. The idle was always perfect. No matter the weather, it would start right up and just purr. Steady, smooth, no fluctuation. It was honestly one of my favorite things about the bike.
I recently shipped it to Alaska and had the 10K service done at the Anchorage Triumph dealer (filters, oil, spark plug, etc.). After picking it up, I immediately noticed the idle was off. The techs did a “12-minute reset” (which meant they reset the computer and let it idle for 12 minutes) and said it sounded fine. It seemed better, so I rode it 400 miles home to Fairbanks - but as soon as I stopped for an hour, and the bike cooled, the idle again fluttered and flucuated.
The dealer says this is a normal sounding idle, but it doesn’t sound right to me. Before the service, it was rock solid. It never waivered of fluctuated - no matter the weather. Now it fluctuates between 1150-1450 RPMs, and continues to fluctuates between 950-1250 RPM as it warms up. Even after riding for five minutes, it still flutters between 950-1250RPMs. I KNOW it did not do this before the 10K service.
I recorded a video so you can hear it for yourself. It’s time-stamped so you can skip around and hear the idle right after start-up, a few minutes and and then again after riding for 5 minutes.
I would really appreciate if anyone could take a listen and let me know: Is this how your Scrambler sounds? Or is something not right? I know this is not how my bike sounded before the service... but the dealer tells me this is how the idle is suppose to sound.

Here is YouTube video:

Thanks in advance - looking forward to your thoughts.