Dome Siren Goes Offline

After installation my dome siren worked fine for 2 1/2 weeks. Lately it has been going off-line at random times . If I go to the garage remove the battery replace it and re-link it, base station will find the siren fine. It tests fine. It is only 30 feet away from a ring Z wave extender. Perhaps it’s the batteries? Anyone else having this problem? Do I need to put an additional extender closer to the dome siren? I could try two new batteries I guess. Just wondering if anyone else had had this problem.