Totally agree.
I had this happen to me - hindsight tells me I should have checked, but tbh I’m not really a forum regular and sometimes rush in without thinking about that stuff.
Anyway, I’ll be running some more laps with the Fiesta this week - I’ll monitor it and update here.
Fiesta ST / Bolo Ocho / Series S
The previous ghost time (53.354) must have been in the system somewhere as I dirtied a 1st run on purpose to see if it would update but it didn’t - so it was forcing me to beat the ghosted time to update.
This is the only event I’m interested in doing so I’ll be running plenty more to monitor it.
It might be worth noting that my home is set to the Rally Adventure and I have to travel to Mexico in order to launch the Bolo Ocho event when first starting.
I’m beginning to wonder if this bug only affects native Microsoft players (Xbox/Microsoft Store users) in the same way that a certain treasure chest went missing for non-STEAM users all those months ago.
Well not sure about that however I did run another two or three earlier and the Monthly rivals vs players were back to were they should’ve been.
Not holding my breath that it’s been sorted though as the same thing happened in Autumn S35 then got bugged again after that. Just after Wolf said it had been fixed way back then.
Guess I’ll just have to wait and see what happens after Thursday…
Here’s hoping 
Hopefully they’ve taken the suggestion, gone back to S34 when all was OK and found the bug that changed it ever since and fixed it for all future playlists.