The pollTimeout must be set to zero if less than zero.

Terminal.Gui/ConsoleDrivers/CursesDriver/UnixMainLoop.cs

@@ -175,10 +175,18 @@ namespace Terminal.Gui {
 			if (mainLoop.timeouts.Count > 0) {
 				pollTimeout = (int)((mainLoop.timeouts.Keys [0] - now) / TimeSpan.TicksPerMillisecond);
 				if (pollTimeout < 0) {
-					// This avoids poll waiting infinitely if pollTimeout=-1 until some action is detected
-					if (pollTimeout == -1) {
-						pollTimeout = 0;
-					}
+					// This avoids 'poll' waiting infinitely if 'pollTimeout < 0' until some action is detected
+					// This can occur after IMainLoopDriver.Wakeup is executed where the pollTimeout is less than 0
+					// and no event occurred in elapsed time when the 'poll' is start running again.
+					/*
+					The 'poll' function in the C standard library uses a signed integer as the timeout argument, where:
+
+					    - A positive value specifies a timeout in milliseconds.
+					    - A value of 0 means the poll function will return immediately, checking for events and not waiting.
+					    - A value of -1 means the poll function will wait indefinitely until an event occurs or an error occurs.
+					    - A negative value other than -1 typically indicates an error.
+					 */
+					pollTimeout = 0;
 					return true;
 				}
 			} else