Zwift results shows invalid times for riders not yet finished

Hi there,

I completed stage 4 of TdZ today, and noticed that the riders that had still to finish were listed in the results, but showing as an invalid time:
The minutes were all -2.1 billion (0xFFFFFFFF in 2s compliment)
The seconds were either zero, or 16384 (0x4000)
The fractional seconds were all zero.