diff -r 6ca6e8c647d4 -r 128efb9d148b src/mainwindow.cpp
--- a/src/mainwindow.cpp	Mon Jul 19 23:41:52 2021 +0300
+++ b/src/mainwindow.cpp	Tue Jul 20 01:22:01 2021 +0300
@@ -399,6 +399,10 @@
 {
 	if (tool != nullptr && tool != this->selectedTool)
 	{
+		if (this->selectedTool != nullptr)
+		{
+			this->selectedTool->reset();
+		}
 		this->selectedTool = tool;
 		for (auto&& pair : items(this->toolActions))
 		{