to reproduce:
add to qtlogging.ini:
    qt.qpa.uiautomation=true

Run this command to get all TextRange Move*** invocations:
    > .\QTBUG-109578.exe 2>&1 | sls "::Move"

INITIAL STATE: "|abc"   // '|' indicates cursor

[->]    // right arrow was pressed
    44.698 qwindowsuiatextrangeprovider.cpp(347):QWindowsUiaTextRangeProvider::MoveEndpointByRange endpoint= 1 targetRange= 0x2174faac8c8 targetEndpoint= 0 this:  QWindowsUiaBaseProvider(0x2174faac8b0)
    44.722 qwindowsuiatextrangeprovider.cpp(347):QWindowsUiaTextRangeProvider::MoveEndpointByRange endpoint= 1 targetRange= 0x2174faab208 targetEndpoint= 0 this:  QWindowsUiaBaseProvider(0x2174faab1f0)
    44.739 qwindowsuiatextrangeprovider.cpp(347):QWindowsUiaTextRangeProvider::MoveEndpointByRange endpoint= 1 targetRange= 0x2174faab7b8 targetEndpoint= 0 this:  QWindowsUiaBaseProvider(0x2174faab7a0)
    44.745 qwindowsuiatextrangeprovider.cpp(347):QWindowsUiaTextRangeProvider::MoveEndpointByRange endpoint= 1 targetRange= 0x2174faab4a8 targetEndpoint= 0 this:  QWindowsUiaBaseProvider(0x2174faab490)
STATE: "a|bc"

[->]
    55.180 qwindowsuiatextrangeprovider.cpp(347):QWindowsUiaTextRangeProvider::MoveEndpointByRange endpoint= 1 targetRange= 0x2174faab6d8 targetEndpoint= 0 this:  QWindowsUiaBaseProvider(0x2174faab6c0)
    55.197 qwindowsuiatextrangeprovider.cpp(347):QWindowsUiaTextRangeProvider::MoveEndpointByRange endpoint= 1 targetRange= 0x2174faac4d8 targetEndpoint= 0 this:  QWindowsUiaBaseProvider(0x2174faac4c0)
    55.216 qwindowsuiatextrangeprovider.cpp(347):QWindowsUiaTextRangeProvider::MoveEndpointByRange endpoint= 1 targetRange= 0x2174faab3c8 targetEndpoint= 0 this:  QWindowsUiaBaseProvider(0x2174faab3b0)
    55.221 qwindowsuiatextrangeprovider.cpp(347):QWindowsUiaTextRangeProvider::MoveEndpointByRange endpoint= 1 targetRange= 0x2174faab5f8 targetEndpoint= 0 this:  QWindowsUiaBaseProvider(0x2174faab5e0)
STATE: "ab|c"

[->]
    60.121 qwindowsuiatextrangeprovider.cpp(347):QWindowsUiaTextRangeProvider::MoveEndpointByRange endpoint= 1 targetRange= 0x2174faabf28 targetEndpoint= 0 this:  QWindowsUiaBaseProvider(0x2174faabf10)
    60.149 qwindowsuiatextrangeprovider.cpp(347):QWindowsUiaTextRangeProvider::MoveEndpointByRange endpoint= 1 targetRange= 0x2174faab898 targetEndpoint= 0 this:  QWindowsUiaBaseProvider(0x2174faab880)
    60.166 qwindowsuiatextrangeprovider.cpp(347):QWindowsUiaTextRangeProvider::MoveEndpointByRange endpoint= 1 targetRange= 0x2174faaccb8 targetEndpoint= 0 this:  QWindowsUiaBaseProvider(0x2174faacca0)
    60.174 qwindowsuiatextrangeprovider.cpp(347):QWindowsUiaTextRangeProvider::MoveEndpointByRange endpoint= 1 targetRange= 0x2174faab438 targetEndpoint= 0 this:  QWindowsUiaBaseProvider(0x2174faab420)
STATE: "abc|"

[->]
    64.204 qwindowsuiatextrangeprovider.cpp(347):QWindowsUiaTextRangeProvider::MoveEndpointByRange endpoint= 1 targetRange= 0x2174faac4d8 targetEndpoint= 0 this:  QWindowsUiaBaseProvider(0x2174faac4c0)
    64.214 qwindowsuiatextrangeprovider.cpp(347):QWindowsUiaTextRangeProvider::MoveEndpointByRange endpoint= 1 targetRange= 0x2174faaccb8 targetEndpoint= 0 this:  QWindowsUiaBaseProvider(0x2174faacca0)
    64.232 qwindowsuiatextrangeprovider.cpp(347):QWindowsUiaTextRangeProvider::MoveEndpointByRange endpoint= 1 targetRange= 0x2174faab518 targetEndpoint= 0 this:  QWindowsUiaBaseProvider(0x2174faab500)
    64.247 qwindowsuiatextrangeprovider.cpp(347):QWindowsUiaTextRangeProvider::MoveEndpointByRange endpoint= 1 targetRange= 0x2174faab588 targetEndpoint= 0 this:  QWindowsUiaBaseProvider(0x2174faab570)
    64.263 qwindowsuiatextrangeprovider.cpp(347):QWindowsUiaTextRangeProvider::MoveEndpointByRange endpoint= 1 targetRange= 0x2174faab128 targetEndpoint= 0 this:  QWindowsUiaBaseProvider(0x2174faab110)
    64.279 qwindowsuiatextrangeprovider.cpp(347):QWindowsUiaTextRangeProvider::MoveEndpointByRange endpoint= 1 targetRange= 0x2174faab2e8 targetEndpoint= 0 this:  QWindowsUiaBaseProvider(0x2174faab2d0)
    64.301 qwindowsuiatextrangeprovider.cpp(347):QWindowsUiaTextRangeProvider::MoveEndpointByRange endpoint= 1 targetRange= 0x2174faac7e8 targetEndpoint= 0 this:  QWindowsUiaBaseProvider(0x2174faac7d0)
    64.316 qwindowsuiatextrangeprovider.cpp(347):QWindowsUiaTextRangeProvider::MoveEndpointByRange endpoint= 1 targetRange= 0x2174faab6d8 targetEndpoint= 0 this:  QWindowsUiaBaseProvider(0x2174faab6c0)
    64.331 qwindowsuiatextrangeprovider.cpp(347):QWindowsUiaTextRangeProvider::MoveEndpointByRange endpoint= 1 targetRange= 0x2174faac468 targetEndpoint= 0 this:  QWindowsUiaBaseProvider(0x2174faac450)
    64.346 qwindowsuiatextrangeprovider.cpp(347):QWindowsUiaTextRangeProvider::MoveEndpointByRange endpoint= 1 targetRange= 0x2174faabe48 targetEndpoint= 0 this:  QWindowsUiaBaseProvider(0x2174faabe30)
    64.362 qwindowsuiatextrangeprovider.cpp(347):QWindowsUiaTextRangeProvider::MoveEndpointByRange endpoint= 1 targetRange= 0x2174faac8c8 targetEndpoint= 0 this:  QWindowsUiaBaseProvider(0x2174faac8b0)
    64.378 qwindowsuiatextrangeprovider.cpp(347):QWindowsUiaTextRangeProvider::MoveEndpointByRange endpoint= 1 targetRange= 0x2174faac548 targetEndpoint= 0 this:  QWindowsUiaBaseProvider(0x2174faac530)
STATE: "abc|"