Car driving during pit stops on the start and finish straights

During a 100% race in Canada, you could see cars driving for others on the start and finish straights, even though they were stopping in the pit lane.

Report Code: DTBV-GOLH-TVVK-TDDG, RTPL-HHLR-DBHR-PZDG, DVJV-CG2R-SRRG-R2BG, RMTJ-DHBM-TMPX-HDRG, X2SJ-PS2L-BL2V-CGHD

https://www.twitch.tv/invertmaster/clip/PlumpMushyWaspTBTacoLeft-C0i29KIdQ62Fmj9G