I have now for both flows (one for opening and one for closing) included 3 times the open or close command with 60 seconds delay in between. So far it works well and as far as I witnessed it all curtains responded at least on the second signal.
@Raymond1269 just to be sure, which app are you using? (See my earlier post Brel sunblinds 433 Mhz prefered position SOLUTION - #7 by fmb )
