Thanks for recording what you saw even though you found a fix for it all. It’s helpful to know what’s going on, and reassures me that when I recommend a phone reboot as a first step, it’s valid.
The simplest way to raise the sample rate you’re seeing on the SD card would be to make sure the logging is set to “MAX” or “No delay” and raising the sample rate in the metering screen. When measuring with default settings, you’ll see 125Hz/32smpl on the metering screen. Tapping the sample rate will let you change it and raise the rate.
Hope this helps