The fix is working fine with Qt5.
Leo 6.4-devel2, devel branch, build 5be9a9acd5
2021-08-10 07:13:24 -0500
Python 3.9.6, PyQt version 5.15.2
Windows 10 AMD64 (build 10.0.19042) SP0
Terminal shows record of Show Next Tip e.g.
show_tips <PyQt5.QtWidgets.QPushButton object at 0x000002D126A7FCA0>
Lewis