Bugged tyre strategy, no mandatory tyre - cant start a race after patch 1.16

I have the same issue! 
I’ve tried to start the Race on slims and in the favoured round manually select mediums to change, but the game still puts up slims, like in the strategy….why? 

And because I will be disqualified for not changing to another compound, I come in for the second time, when finally they willing to put up mediums…:D 

Its really frustrating..