Arduino Uno: Problems with Serial.print()

Projects Programming
5

A few hours ago, I set the baud rate at 115200 and reintroduced the strings in this form:

...
Serial.println(F("Betriebsbereit."));
...
Serial.print(F("i = "));
Serial.println(i);
...

I also increased the number of cycles to 1000. The problem occured again. The Serial Monitor did not display anything past i = 600, yet the Arduino continued to toggle the relays. Any ideas?

Btw, the board is an Arduino Uno, as written in the title of this thread.