Venu 3s won't show training status correctly

I changed from a Fenix 6s pro to a Venu 3s at Christmas, set it up on Dec 28th, since then I've been training a few times a week, getting OK sleep, HR as usual etc and the training status keeps showing as detraining or unproductive because it wants me to snyc my Fenix, even though I've placed my Venu as my primary wearable. It's definitely not the correct status as I know from previous times that only happens when I've stopped training for a 2 week holiday or been sick etc. For example ran 10 miles this morning at average HR 150 and I'm still unproductive! Is there a way to disconnect the Fenix so that it's not impacting the status or asking me to sync the Fenix every time I log in?!