Disappearing spead dial assigned contacts

[Windroid]

Hello all

This is of course a reported issue with no apparent solution. The samsung phone application keeps disappearing the numbers assigned as speed dial. 

I assigned then, within 3 days all of them are wiped off.

All tricks are used to fix the issue in vain (cache clearing, data clearing, system cache, blablabla...) the app is buggy

Any one encountered the same issue?

[Najam]

Having same issue since almost 2 weeks, I am using z fold 6.

 Speed dial numbers vanish without any valid reason.

[Windroid]

They start disappearing after 3 days if you don't use them. And they disappear one by one, starting from the first to the last