With Vout=26.6V, Iout=3A, PSU Shorter = 220k/4k7/100n.
The current spike has been reduced to 2.61V: 0058.jpg
The base of Q1: 0062-0063.jpg , with the ground probe to right side of R_Shunt.
With Vout=26.6V, Iout=3A, PSU Shorter = 220k/220k/330n.
The base of Q1: 64, 65, 66.jpg
LE: I updated the reply.