I used to have all the same issues. I added 5 Aeotec repeaters, with one next to the HE and one next to each lock. That didn’t resolve my issue.
What DID resolve my issue fully and completely was getting a 2nd Hubitat just for the locks and a few repeaters. I have had zero issues since putting in the 2nd HE C5. I wish I would have done that sooner. Details here: Adding Aeotec Range Extenders has made my BE469 and FE599 locks reliable
