Two races in a row today on PC (Japan and Bahrain in My Team) my race engineer has requested "box this lap we need to change tyres and update strategy" even though my tyres are barely worn (between 10% and 20% max) and the car has no damage. The first time it did it I boxed and it put me to dead last, the second time I ignored it and it made no difference to my tyre wear and I made the pit window fine and went on to finish in the points.
However on the race where I ignored it, the few times I used a rewind the race engineer then went through the "box this lap" audio every time which was quite irritating. It feels more like a bug than a race issue cos I had no damage and minimal tyre wear.