Just thinking about it, I sometimes experience the same issue from time to time. I just attributed it to Alexa being flaky.
Does it show in your HE logs?
I think to eliminate a signal issue, if you still have your old wink hub, convert it to a repeater and see if the issue persists. I guess it's pretty easy, but might get you more answers as to whether it's a signal issue or a driver issue. I've never put much time in that situation. I only have alexa connected for announcements. My whole house interacts without a need for dashboards or alexa. Maybe I'll walk around today and see if mine are flaky too. That might not seem like much help, but I do know that my mesh is strong, so if I get flaky responses I'll let you know.
Anyway, here's the link to the wink repeater hack. I'd recommend trying that. So many things get attributed to signal issue, it's nice when you have something to test that issue.
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