ZBeacon TS0505 (Tuya) bulbs

Does anyone have any experience with these? I have 12 of them but I can only get 5 of them to work reliably. Of the rest, 1 loses its pairing after a few days paired, 5 are discovered during pairing but will not operate, 1 paired for a few weeks but then died completely.

Really quite disappointed with it as I’ve had TS0505B Tuya bulbs before and they’ve been fine.