Pressing a button in a single frame is not recognised in Gui-Screens

[ScribbleTAS]

acatthatcanparkourreallywell9900 brought to my attention,
that trying to close a chest via ESC in tickrate 1 would fail sometimes,
if the press was really short and also provided this video (thanks for that!):

https://youtu.be/T2SwdHS4jGM

After further testing I found that it is reproducible with the following inputs:

0|||null;null
1|||-232.35078;23.550083		
2||;0,-56,-32|-87.000725;31.050087
3||;0,-56,-32|-87.000725;31.050087
4||;0,-56,-32|-87.000725;31.050087
5||;0,-56,-32|-87.000725;31.050087
6|ESC;|;0,-56,-32|-87.000725;31.050087
	1|;||
7||;0,-56,-32|-87.000725;31.050087
8||;0,-56,-32|-87.000725;31.050087
9||;0,-56,-32|-87.000725;31.050087
10|ESC;|;0,-56,-32|-87.000725;31.050087
	1|;||
11||;0,-56,-32|-87.000725;31.050087
12||;0,-56,-32|-87.000725;31.050087

There is only a single frame, where ESC was pressed, and the Gui would not close after the second press.

Now after changing the inputs to this:

0|||null;null
1|||-232.35078;23.550083		
2||;0,-56,-32|-87.000725;31.050087
3||;0,-56,-32|-87.000725;31.050087
4||;0,-56,-32|-87.000725;31.050087
5||;0,-56,-32|-87.000725;31.050087
6|ESC;|;0,-56,-32|-87.000725;31.050087
	1|;||
+7|ESC|;0,-56,-32|-87.000725;31.050087
8||;0,-56,-32|-87.000725;31.050087
9||;0,-56,-32|-87.000725;31.050087
10|ESC;|;0,-56,-32|-87.000725;31.050087
	1|;||
11||;0,-56,-32|-87.000725;31.050087
12||;0,-56,-32|-87.000725;31.050087

It now works which is to be expected.
However, I also found out that this also works:

0|||null;null
1|||-232.35078;23.550083		
2||;0,-56,-32|-87.000725;31.050087
3||;0,-56,-32|-87.000725;31.050087
4||;0,-56,-32|-87.000725;31.050087
5||;0,-56,-32|-87.000725;31.050087
6|ESC;|;0,-56,-32|-87.000725;31.050087
+	1|||
7||;0,-56,-32|-87.000725;31.050087
8||;0,-56,-32|-87.000725;31.050087
9||;0,-56,-32|-87.000725;31.050087
10|ESC;|;0,-56,-32|-87.000725;31.050087
	1|;||
11||;0,-56,-32|-87.000725;31.050087
12||;0,-56,-32|-87.000725;31.050087

I have only removed a semicolon here...

So it seems that guis can't handle empty input sections which is interesting...