Bug-Transformer and Optocoupler interaction

[rouchmaeuder]

Issue

A transformer, switched by a mosfet, in turn switched by a squarewave, seems to switch on a optocoupler at turn off for a infinitely small time:

Reproduction

Chrome Version 130.0.6723.59 (Official Build) (64-bit)
windows 11
circuit:

$ 1 0.000005 10.20027730826997 70 5 43 5e-11
T 144 208 192 224 0 4 5 -0.0012938558784060042 -5.115590735869941e-19 0.999
R 144 208 128 208 0 0 40 5 0 0 0.5
f 112 256 144 256 32 1.5 0.02
g 144 272 144 288 0 0
R 112 256 80 256 0 2 40 5 0 0 0.159154943092
407 272 272 320 272 1
R 400 272 432 272 0 0 40 10 0 0 0.5
g 368 304 384 304 0 0
r 400 272 368 272 0 1000
o 4 64 0 4099 5 0.00009765625 0 2 4 3
o 8 64 0 4099 10 0.0125 1 2 8 3