Assuming that Wikipedia is correct - https://en.wikipedia.org/wiki/List_of_red-flagged_Formula_One_races
(look for the ones that have 2 separated rows of reasons)
in fact here they are - with my memories;
1981 Belgian Grand Prix - a truly chaotic race (and note how the World Feed often creates a "narrative" - e.g. Nelson Piquet storming into the Williams garage in attempting to fight Alan Jones was missed - but a confrontation between the 2 in 1980 in Canada after that red flag was picked up and so became "narrative". Compare with say Belgium 1998 where the World Feed picked up that garage confrontation and so that became a "narrative" too)
1987 Austrian Grand Prix - highlights are often repeated on Sky Sports F1 so I won't give spoilers - note how narrow home straights tend to cause problems.
1988 Portuguese Grand Prix - I don't remember that one - I did watch it.
1990 Belgian Grand Prix - I think this was the race where Nigel Mansell (in the first accident which was at La Source) was walking back to the pits when he looked back and saw a marshal sitting in the stricken Ferrari and steering it as it was towed away - and Mansell ran back down the track and told him to get out! (In case he broke something).
2014 Japanese Grand Prix - Jules Bianchi sadly killed of course.
2016 Brazilian Grand Prix - so that was when Nico Rosberg could afford to finish 2nd in 3 races and 3rd in the other even even if Lewis Hamilton won the last 4 races - and which was what then happened!
2020 Tuscan Grand Prix - today.
--- SBBSecho 3.06-Win32
* Origin: SportNet Gateway Site (24:150/2)