Ive bought a Minolta x300 today. First ever camera, I have no idea of what I'm doing. Film came out with a brighter strip on top and bottom. Shot on Ilford HP 5 Plus 400. Ive used Ilfosol 3 Developer, 1+9 dillution at 24 degrees for 5:30. 3 rinses with 22 degrees water. 4 minutes in Ilford Rapid Fixer, 1+4 dillution.
Bump
looks like your agitation is lacking
add developer
tap tank to remove bubbles
agitate full min
agitate for 15 sec every min
24 degrees for the dev is a little warm but no big deal, it's going to be faster so your agitation & time become more critical.
temp for stop, fix, and rinse, is less important.
I usually stop in straight water, an old timer once told me that it is less of a shock to the grain, I don't see much of a difference but it has not negativity affected my negs in any way and why pay for chem if it isn't needed