Xiaomi mi8
Before this version pistons with slime blocks on top power at the same time with the same tick, however now it appears to power a randomly selected piston instead of powering all at the same tick

Steps to reproduce:
1.put 4 sticky pistons in a square facing upwards
2. Put 1 slime block on each of the pistons
3. Connect repeaters with the same tick to power the pistons at the same time, use redstone to connect the repeaters to a unified power source
4. Use button to power the redstone