Created attachment 144975 [details] Example slide PPTX Open attached example slide PPTX that comes from Bug 50265 slide 3. See that red text in legend appears missing. Note: Text is there and can be seen if legend box size is increased in LO. Can't say if it's about box size or Microsoft fonts rendering. Repro from LO 3.4.0 to 6.2+. In Lo 3.3 it was show but with wrong shape.
Created attachment 144976 [details] Example slide PDF from MSO
confirm in LO 6.1.2.1 on Windows 10
Repro 6.3+
Text Box is "Do not Autofit" like in Bug 116418. But I will not mark duplicate because it's a legend.
Probably a duplicate of bug #122225 - seems like MSO chart legends have much smaller internal padding for the legend items box.
Created attachment 162507 [details] Screenshot from current master
*** This bug has been marked as a duplicate of bug 122225 ***