Factory reset on WLED caused by SignalRGB

Hey guys,
I have installed the latest version of WLED on my ESP8266-12F WLAN with 4MB flash. The recognition of WLED within SignalRGB also works wonderfully, as does the control. However, my problem is as follows:

Every time SignalRGB is restarted (either manually or by rebooting the system), the WLED settings are reset to the factory settings. This is annoying in that I have to reconfigure WLED every time.

There is probably a similar behaviour if the ESP has too little flash, but 4MB should actually be enough. Similarly, test operation without SignalRGB works smoothly → The settings are retained even after disconnection from the power supply and several days of operation. Can you help me or alternatively recommend another firmware for my ESP with which I can control my LED strips (WS2812B) using SignalRGB?