Unexpected behaviour from NavigationToolbar2QT - matplotlib

I've tried running the code from this answer, and get the following (after pressing 'Plot':
Here's what I find unexpected: if I press the 'pan axes' button in the navigation bar (highlighted in blue in the above screenshot), move the figure slightly to the right, and then press the 'home button' in the navigation bar, then nothing happens.
However, if then move the figure again and then press the 'home button' again, then it returns me to the position I got to after I moved the figure once.
How can I set the navigation bar up so that the 'home' button returns me to the original plot every time?

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https://snack.expo.dev/#linkeddg/materialtoptabnavigator-issue?platform=ios

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I cant press correctly to a button (navigation + svg)

I use this code snippet:
enter link description here
The problem is, the button has no effect when I tap a little bit at the top it press only when I my finger is in the middle of the black line or under, I hope you understand me. So if I press the button sometimes it effects sometimes not, if I tap every time at the bottom on the button then it works, but not at the top. How can I make correctly pressable that it works ? its only press when I am at the between on the svg (navigation height)

first click is of no effect when focusing on TextInput and then click elsewhere

as showed above, focus on the TextInput, then click elsewhere.
The first click on green area is of effect.
The first click on red area is of no effect ( it's a ListView ). The same thing happens on the first click of hardware back button on Android when previously focusing on TextInput.
Is it a bug or that I omit something ? ( the version of react-native I use is 0.16.0-rc )
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in iOS7 we lost the button to the right of search.
Can anyone please help me, I'm unable to figure out what to do.