JabRef 5.3--2021-01-14--e66f5be
Windows 10 10.0 amd64
Java 14.0.2
JavaFX 15.0.1+1

• Mandatory: I have tested the latest development version from http://builds.jabref.org/master/ and the problem persists

The following also works with other titles containing "-". And also with other search engines. The below example triggers the bug every time:

Steps to reproduce the behavior:

1. Under Web Search -> Select DBLP
2. Type "Collecting Performance Data with PAPI" into the web search field
3. Type a "-" afterward and now the app does not respond anymore.

I did not find any log file or information in the event log.