Wagering on the 2016 Kentucky Derby failed to surpass 2015’s record handle, in part due to a major technical failure at Betfair’s US advance deposit wagering (ADW) operations.

According to stats released by Louisville-based Churchill Downs Inc (CDI), total wagering on the Kentucky Derby Day program amounted to $192.6m, down 1% from 2015’s record. Wagering on the actual Kentucky Derby race fell 10% year-on-year to $124.7m, the lowest figure since 2011.

On-track wagering was up 2% to $23.5m on the day’s total package but down 6% to $11.3m on the marquee race. Business was far more brisk at CDI’s ADW site TwinSpires.com, which reported the day’s wagers up 29% to $26.8m, while racing on the marquee event was up 22% to $16.6m.

But the day was a disaster for the US operations of UK-listed betting exchange Betfair (now part of the enlarged Paddy Power Betfair group), which saw its US-facing ADW site TVG go offline for nearly three hours on Saturday.