Why ??
My simplified code in attachment
https://yadi.sk/d/Mg9UCTbJfZgvng
Note: the start page address is 192.168.4.1
1) no LED strip is needed to check the sketch
2) before uploading the sketch, first upload the data (from the data folder)
3) I am using an older ws2812fx slightly modified (attached)
4) to check free memory-192.168.4.1/mem
Problem - Wi-Fi suddenly falls off in access point mode:
1) when loading web pages
2) when you turn on the buttons on the start page
3) the problem is stronger/faster manifested, the higher the LED_COUNT value for the WS2812FX class()
LED_COUNT = 600 - web pages can not be loaded at all. Wi-Fi falls off right away
LED_COUNT = 100 - it may seem that everything is fine, but after a while (the number of requests, connections), Wi-Fi also falls off.