bilekj:
Fixed in commit GitHub - JiriBilek/WiFiSpi at 4d12b26c8c5e80786d972e845f90f7bb858427b0
Please get new version of master library and try again.
I re-downloaded the entire lib from the root - not from this commit - and although it had a few misfires the first couple of tries, now it seems to work fine.
I added a "ticker" to WiFiSpiESP so that it blinks while connecting to the wifi network and it blinks slowly if wifimanager is enabled and gets called. After connecting, the led goes steady.
If you think this is interesting, I can send you the .ino file to publish.