@DanSmith,
What is your setup such as what point of use devices are you using (PC windows, Apple, phones, tablets etc.) and also if you run your devices off Starlink's wifi, or if you have your own router or if you connect to a pc via an ethernet? Are all your devices affected the same?
Basic steps I use to help me have a more complete picture:
My phone (Samsung S7) is always connected via the Starlink router (wifi) and is the device that my Starlink app is on. For me the Starlink app speed tests always look great, but don't necessarily reflect my real performance. My main point of use is my pc with Windows 10 and is connected directly via a Cat6 cable. On my pc I run a couple of different speed tests through my Chrome browser (the results shown above). While still not a perfect test, it does tell me real performance. Also, I go into Task Manager (windows 10), select the performance tab, then click on Ethernet in the left panel while I'm doing a large update or streaming a movie. This accurately shows the data throughput at my nic card (on motherboard) which allows me to compare to the browser based speed tests and what the Starlink app tests are showing to what my ethernet is actually receiving.
While I was waiting for my ethernet adapter (I have version 2 dish), I used a USB wifi adapter plugged into my pc. I had similar issues to what you described. At first I was resetting the Starlink router which helped, but soon learned the issue was with the usb wifi adapter. I had to force a reset on it a couple of times a day. Once my ethernet adapter came, and I was hardwired to Starlink, I no longer had this issue.
You are pretty far north and should have good satellite coverage (at least compared to points south) if you are in North America. Is your view clear according to the Starlink app?