Textfield not editable - "getSelectedText on inactive InputConnection"

I am facing a very strange issue in my Titanium Studio 3.2. I try to develop an Alloy application for Android 4.1). I created a TableLayout with a Textfield in it. When I try the program on my device (Samsung Galaxy Ace 2), I cannot enter any text. As soon as I click on the textfield the keyboard shows up, but i cannot enter any text. I noticed that I am able to enter text, if I type inmediately after clicking on the textfield. It seems like it is possible to enter text within half a second after clicking on the textfield. After this short period of time it is not possible anymore. In my logs I can see the following messages, which explain this issue:

[ERROR] : SpannableStringBuilder: SPAN_EXCLUSIVE_EXCLUSIVE spans cannot have a zero length [ERROR] : SpannableStringBuilder: SPAN_EXCLUSIVE_EXCLUSIVE spans cannot have a zero length [WARN] : IInputConnectionWrapper: getSelectedText on inactive InputConnection [WARN] : IInputConnectionWrapper: setComposingText on inactive InputConnection

If I add a textfield in a sample program I can enter text normally.

Here is my view:

<Alloy>
    <Tab id="searchTab">
        <Window class="container">
            <TableView id="form" width="100%">
                <TableViewRow width="100%">
                    <Label class="description" text="Ort: "></Label>
                    <TextField id="location"></TextField>
                </TableViewRow>
[...]

[...]
"#location": {
    left:100,
    width:"70%",
    color: '#336699',
    editable:true,
    enabled:true,
},
[...]