It seams to be latching. I’m using a wire as a switch and when I close it the LED goes on, but when I open it it stays on.
EDIT
After playing for a while the 555 caught fire, so I tried another and it flashed the LED once and stopped working. 2 more blown 555s and I put the diodes back, and this 555 looks like it turns the LED on and off instantaneously - no lag - with the wire switch.
Back to my old 80s 555(tested in my simply osc circuit) and it latches, but another 80s 555(tested in my simply osc circuit) does the on and off instantaneously.
The Ebay 555 could be fakes, but it seams thay they latch or don’t delay the off.
EDIT EDIT
The working Ebay 555 blew so back to the latching 555, and now if I tap the wire quickly to GND it flashes a little. I think I have to get some new 555s of better quality.