When spectating another player (while you are on the track or in spectator mode, it does not seem to matter), if someone pits, either you cannot tab to another player, or the number of players to which you can tab is reduced. Meaning, some or all of the cars get left out of the tab rotation. Once someone pits out, you can tab everyone again. This does not seem to happen every time someone pits but it occurs very often.
Mainly just an annoyance but definately worth a look.
Mainly just an annoyance but definately worth a look.