Yesterday I found out, you can actually switch back to 60 Hz mode from 144 Hz by just doing so in the advanced Monitor settings ... I was really surprised! No issues at all with it! Also LegionSpace recognizes the switch. I don't know why I haven't thought about this before!
Thought it could be quite useful for you guys when beeing on the go until the actual LegionSpace fix will be coming out .
-> I know it isn't comfortable like switching it directly in LegionSpace, but still it works .