[Windows][QBS] Occasional crash when using kit selector

With a large QBS project Qt Creator sometimes crashes when using kit selector to change between Qt kits or between release/debug builds.

The crash happens due to access violation in Qt5Script.dll.

Exception thrown at 0x50083EAA (Qt5Script.dll) in qtcreator.exe: 0xC0000005:
Access violation writing location 0xBBADBEEF.

Unfortunately we don't have debug symbols for Qt Creator and therefore the stack trace doesn't give much more than Qt5Script.dll and qbscore1.dll library names (attached stacktrace_nosymbol.log). Also unfortunately we don't have an example application to reproduce the crash.

This happens occasionally on Windows 10 after some time, but it hasn't happened on Linux at all.