I got the same problem, it shocked me the first time I saw it but after a while I already get used to it. As long as I never rebooted my phone for 3 days, it will start asking for PIN but only once which I think I can still accept this.
I have a long pin , I already find it annoying to have to enter it after a restart. But now every 3 days is just f retarded.... Instead of extra security now I'm thinking of removing it or shortening it.... Desired effect huh....
What a f. stupid feature. ...Especially that it appears suddenly, without warning. ...for example when you're in hurry and need to quickly unlock your phone. ...and then you realize that you have ~20 letters password, and only one hand available... FUU.....^%$#$#!!!11oneone
I ended up disabling fingerprint lock and every other lock all together because this was so annoying, well done Huawei now in order to be convenient my phone is LESS secure, PLEASE reverse this in the next update or my next phone will be by a different manufacturer, the fingerprint lock was and IS good enough on its own without this annoyance.
Because it is, just because is isn't for you doesn't mean we should all accept that it must be fine then, because YOU think it's ok, it's not ok for some of us and we should at least have the option to disable it and not have it forced upon us.