[werk_ag]

Of course. The 4-day forecast has been behaving strangely from the very beginning. First, after the next refresh (after about 1 hour after the restart) empty icons appeared. This concerned the PL and EN versions. The next time the receiver is restarted after selecting the forecast screen. 

Result (2.4.2):

Those icons appear when the 4-days forecast download or update fails. Check if WiFi connection is stable.
Is it happen with the Wireless Display unit too, or just with the Pro2 Compact?
Software version?
Which size have you used for the SPIFFS? 1Mb is enough.

And yesterday I died two ESP8266 (ESP in Pro + and Wemos D1 in Compact  ....there are such days ....) and I had to replace them with new ones.
Pro + already works perfectly and Compact is just testing.

Out of curiosity, how you "killed" the two ESP8266?