Spain Pit Lane Speed Issue

I was doing a league social race last night and picked up an unexpected 10 second speeding penalty while entering the pits.

I've looked back through and confused as to why this has happened? Speed limiter is 50mph and I don't exceed 50mph at any point.

Twitch Clip:
https://clips.twitch.tv/create/CleanTastyPotBIRB-XpwjVTOkF_QLORvG