Hi Mojave,
I had film in the fujipet, for a while.Hadn't finished the roll . Film counter window was taped up, as it was a roll of 220. & ...well I couldn't remember if it was loaded. So ...I did the usual "oh crap' move. & pulled back the tape. Hence exposing to light.
I'm pretty sure that's what those streaks are. As they are randomly spread, since the roll was at midway.
The 2nd photo was on a roll (also 220)that hadn't been exposed to light.
Also.. when ever I do the stand method. For fear of bubbles. About half way through time , I give the tank a tap on the counter. & I always over fill with developer to assure coverage.
Hope this helps