Frequent crashes due to wxEVT_MOUSE_CAPTURE_LOST

[FichteFoll]

For a couple months I've been getting random crashes when clicking on entries in the subtitle grid. According to discord logs, I first complained about this on 2019-05-01. I haven't used an automation script and I usually don't have video (or audio) playing in these situations.

Traceback below:

ASSERT INFO:
./src/common/wincmn.cpp(3346): assert "Assert failure" failed in DoNotifyWindowAboutCaptureLost(): window that captured the mouse didn't process wxEVT_MOUSE_CAPTURE_LOST

BACKTRACE:
[1] wxOnAssert(char const*, int, char const*, char const*, wchar_t const*)
[2] wxWindowBase::NotifyCaptureLost()
[3] wxMessageDialog::ShowModal()
[4] wxMessageBox(wxString const&, wxString const&, long, wxWindow*, int, int)
[5] wxEvtHandler::ProcessEventIfMatchesId(wxEventTableEntryBase const&, wxEvtHandler*, wxEvent&)
[6] wxEvtHandler::SearchDynamicEventTable(wxEvent&)
[7] wxEvtHandler::TryHereOnly(wxEvent&)
[8] wxEvtHandler::ProcessEventLocally(wxEvent&)
[9] wxEvtHandler::ProcessEvent(wxEvent&)
[10] wxEvtHandler::SafelyProcessEvent(wxEvent&)
[11] wxWindow::GTKSendPaintEvents(_cairo*)
[12] g_closure_invoke
[13] g_signal_emit_valist
[14] g_signal_emit
[15] gtk_container_propagate_draw
[16] g_closure_invoke
[17] g_signal_emit_valist
[18] g_signal_emit
[19] gtk_container_propagate_draw
[20] g_closure_invoke
[21] g_signal_emit_valist
[22] g_signal_emit
[23] gtk_container_propagate_draw
[24] g_closure_invoke
[25] g_signal_emit_valist
[26] g_signal_emit
[27] gtk_container_propagate_draw
[28] g_closure_invoke
[29] g_signal_emit_valist
[30] g_signal_emit
[31] gtk_container_propagate_draw
[32] gtk_container_propagate_draw
[33] gtk_main_do_event
[34] g_signal_emit_valist
[35] g_signal_emit
[36] g_main_context_dispatch
[37] g_main_loop_run
[38] gtk_main
[39] wxGUIEventLoop::DoRun()
[40] wxEventLoopBase::Run()
[41] wxAppConsoleBase::MainLoop()
[42] wxEntry(int&, wchar_t**)
[43] main
[44] __libc_start_main