The Bahrain GP in Malaysia was one of the crazier races I've seen in F1. Road systems became gridlocked and transit buses blocked. While the event was necessarily hurriedly assembled, this was still disappointing. At least those I spoke with said they thoroughly enjoyed the race and spectacle.
'Chaos' before the start as software glitches in wet. Many of the six Ferrari-powered cars seemed affected, some Red Bull Powertrains and a McLaren Mercedes too. It turned out to be FIA software settings. All cars must run a standard FIA 'brain' which couldn't compute with cars travelling at such increasingly slow speeds, shutting down power delivery. The only option was to abandon the whole thing and recover to the pits.
Although it took 40 minutes all told, a smart and fair decision was made that the restart would be in original grid order. The FIA quickly found the issue, rewrote some code, and flashed that 'patch' to all the cars.
'Sponge-like' surface catches out Ferrari and McLaren. This track, often doused mid-race with a cloudburst, used to dry out remarkably quickly, but temperatures had been much lower on race day than during practice and qualifying.
Source: Sky Sports Champions League · Summarized by HeadlinesBriefing