Cannot read property 'segmentNrInTask' of undefined

To reproduce

1. Open the replace window and trigger the search (the search result should appear in more than one segment)
2. click on replace
3. the previous segment is closed, the next one is opened, but the replace button is disabled
4. again click on search and the error happens

Stack trace

Uncaught TypeError: Cannot read property 'segmentNrInTask' of undefined
at constructor.findEditorSegment (SearchReplace.js?_dc=1551958361446:1308)
at constructor.handleRowSelection (SearchReplace.js?_dc=1551958361446:961)
at success (SearchReplace.js?_dc=1551958361446:815)
at Object.callback (ext-all-debug.js:8705)
at constructor.onComplete (ext-all-debug.js:25786)
at constructor.onStateChange (ext-all-debug.js:25740)
at XMLHttpRequest.method (ext-all-debug.js:6862)