Created attachment 172496 [details]
sample ODP saved as PPT and compared
Open ODP attachment 166228 [details].
Save as PPT.
Reopen in LO and MSO and see that highlight is lost in both.
As a control, save in MSO and reopen, see it's good in both.
This is filesave bug.
This is PPT version of fixed PPTX bug 96061.
confirm in Version: 184.108.40.206.alpha0+ (x64) / LibreOffice Community
Build ID: cb2827f5f65324f309fa0e3c30d0b19ad237410e
CPU threads: 8; OS: Windows 10.0 Build 19042; UI render: Skia/Raster; VCL: win
Locale: ru-RU (ru_RU); UI: en-US