The four-hour morning session was halted after only 27 minutes after a drain cover came loose on the outside kerbs on the approach to the Turn 11 uphill left-hander.
This appeared to be triggered by Red Bull driver Sergio Perez running over the strip - although the Mexican did not exceed track limits - with his RB20.
At the time, Thursday pacesetter Carlos Sainz also topped the leaderboard for Ferrari courtesy of a 1m31.247s lap, moving him 0.861 seconds faster than McLaren pilot Lando Norris.
It seems that the particular kerb is the same one that was dislodged after two hours and 22 minutes of track time on Thursday morning.
FIA race director Neils Wittich drove the medical car to the scene to inspect the damage.
Source: Autosport