@Mamacity,
Thank you for reaching out to us.
These flags are inherited from Chromium and, as it is stated on the flags page, are experimental and not guaranteed to work, regardless of which browser they’re enabled on.
In our case, there is clearly some conflict here with the functionality, but it is unlikely to get fixed by us (specifically), given that it is an inherited feature. It will likely have to be fixed upstream.
Ok. For future documentation (incase someone wants to look at this topic again), I was using the “Enabled- tabs don’t shrink” option. I believe when you use the tabs shrink option, this problem doesn’t happen.