Logic Pro X - Mojave

Since I did the update to Mojave from High Sierra I now got huge problems with the CPU in Logic Pro X. It ran smooth before the update...

Even with only a few plugins active some of the cores max out. Tried the usual stuff (Buffer size, Processing threads, Buffer range, etc) but it's not doing anything.

Activity monitor is showing that Logic is running at 150 CPU %.

Running a:

MacBook Pro (15-inch, 2016)

Processor: 2,6 GHz Intel Core i7

Memory: 16 GB 2133 MHz LPDDR3

Graphics: Radeon Pro 450 2048 MB / Intel HD Graphics 530 1536 MB