UE-5.6.1 still super unstable

In this new UE , still super unstable , I even can’t save a very simple animation blueprint assert… this didn’t happen often before:

When I clicked save button , then :

PS: I am following this tutorial:

I am now found the reason of crashing UE editor now,
say i have a level sequencer A ( LS_A ) and a Animation Blueprint ( ABP_B ) , LS_A referencing ABP_B and using ABP_B’s variables in a tracker , when open up LS_A and ABP_B at the same time , and then edit ABP_B then try to save it , will cause this crash :

so the workaround is don’t open up level sequencer and animation blueprints at the same time,
hope EPIC fix this issue soon , otherwise can’t continue working anymore …