For a start, please provide a lot more information such as web or app, os, versions, why are you being forced to login, etc, etc.
And are you talking about the following two settings:Particle Animation Pressure
If yes I can confirm that these settings 'stick' for me.
Please also note another user where unexpected behavior occurred because of user side setup parameters, rather than Windy itself: https://community.windy.com/topic/8635/bookmarked-zoom-levels-thrown-away/5
And in any case, please still don't shout, it's not appreciated (I have reviewed your other posts, and from a moderation perspective you are on thin ice...)
With more details perhaps it can be looked at further by the developers.
@TomSlavkovsky please check and reply :)