I have some hue light (ZigBee) for some years and they are rock solid but pricey. That being said, another possibility for your issue could be wifi interference, you could try to analyse and change wifi Channel on your router to see if it gets better.
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I’ve looked at Hue, but didn’t see any outdoor rated flood lights in their line up. Perhaps I’m just blind.
I have looked at the wi-fi. They’re locked to 2.4 GHz, but I can’t change the channel on the Deco mesh that I have. It scans the network and selects what it thinks is the best. According to my signal scanner, it’s not in the best channel, but it’s not in the worst, either. Plus, the same scanner says the lights should be getting an excellent signal where they are in relation to the AP.
Mines are not outdoor rated, they are just bulb behind (don't know the word in English) https://duckduckgo.com/?q=applique+ext%C3%A9rieure+lumi%C3%A8re+&t=fpas&iax=images&ia=images
Here is one outside rated (but should have more available) https://www.bestbuy.com/site/philips-hue-white-welcome-outdoor-floodlight-black/6326654.p?skuId=6326654&intl=nosplash
It is normal behaviour to have them locked to 2.4ghz (just like any other wifi smart things). And it is better that way as 2.4ghz has a longer wifi range than 5ghz.
I think I saw some Moe's branded flood lights not long ago. Check them out. Their Matter bulbs have been totally solid for me.