[Bug?] Camera forced to reset to 0,0,0 when launching game

Hi, I’m using 4.22.3 and attempting to make animation w/ sequencer. The issue is that my sequence did’t play and camera location was reset to 0,0,0 when launching standalone game mode but somehow it worked fine in selected viewport mode. Is this a bug or I messed something up?

Could anyone help me? Thank you!

here are some screenshots of my sequencer and blueprint setups

Play w/ selected viewport mode. the first frame should be like this

but in standalone game it became this

I fixed it myself by changing the sequencer clock source from Timecode to Tick.
not sure why this change worked but it did solve my problem