Franco Colapinto brought out the first red flag of the day early on during the opening morning of testing in Bahrain.
The Argentine was forced to pull over and park his A526 at the side of the track due to an unidentified issue.
The car was later recovered by the marshals and brought back to the garage, with the Argentine then able to rejoin the session and add a further eight laps to his mileage so far.
Aside from that, no other significant technical issues have been reported, with everyone already racking up a solid number of laps — continuing the strong overall reliability seen in Barcelona.