Wierd, i've got the same issue. FP & Railclone ( both latest - Max 2019 ) Toolbars aren't fixed anymore, they're always moving down into a second toolbar "row"
This issue is noticable since i've made following updates ( same day ):
- Projectmanager ( Update to latest )
- Babylon JS Exporter ( Installed latest )
- Windows cumulative Update KB5003173