For those that don’t have to constantly log in, consider yourself lucky. At home I have to re-login occasionally and at WDW almost constantly (although some trips are better than others). The only time it annoys me is at WDW.
For specs, iPhone X, always the latest app version, Face ID enabled. Had the same issues with the prior iPhone version with the fingerprint scanner as well.
I guess from the different experiences above, YMMV!