RoseApp Connection loss

Now my RS130 is connected via Coax and/or Toslink to my Primare SPA25.
Sound quality is outstanding, never heard that before.
Very nice machine, well designed and so far i‘m satisfied but:

RoseApp connection loss very often, no reason in sight.
Sometimes streaming stop without warning.
iPad user, no difference by iPhone.
Had to restart RoseApp to often, no stable.

Will learn and be patience, but i‘m afraid too many software issues.