Luxe heart rate reading massively inflated at start of runs

[Somedude49]

For some time now my Luxe has a tendency to spike by 40bpm or even more for several minutes at the start of runs. Here's a recent treadmill session, and then the same session as recorded by a Polar H10:

At one point the Fitbit had my heart rate at over 200 (pretty sure I'd be dead if that actually happened), when my actual rate was around 120.

It doesn't do this 100% of the time, but seems like more than 50%. Seems like something is off with its algorithm?

And before anyone asks, yes I've already done all of the standard steps for ensuring an accurate reading (making it tighter, higher on my wrist, etc). Notice that the reading for the rest of the session is solidly accurate—it just does this for the first few minutes (consistently).

[Cdpops]

Have you resolved this and is so how? Mine keeps doing similar I’m not even breathing heavily. 

[Somedude49]

Unfortunately no. No response from Fitbit I see either. I've resorted to
just taking it off for the first few minutes of the run.