error encountered in splitting pdf using ver 3.0.0

From sethmu tha on the mailing list

I use the new version as

> java -jar pdfbox-app-3.0.0.jar split -i=km.pdf -endPage=4 -outputPrefix=test -startPage=2

There is output file "test-1.pdf". But when it was opened, it shows error message:
Cannot extract the embedded font 'FPHGCA+PyidaungsuBook'. Some characters may not display or print correctly.

However, when I tried with pdfbox ver 2.0.29,

> java -jar pdfbox-app-2.0.29.jar PDFSplit -startPage 2 -endPage 4 -outputPrefix test km.pdf

The output file "test-1.pdf" file shows all pages correctly without any issue.

In fact, when I use the another pdf file which has many pages, sometimes I encounter blank pages when using the ver 3.0.0, but when I use ver 2.0.29, there is no such issue.