I can confirm this bug - testing Lubuntu Hirsute daily 27.11.2020 on the QA site
http://cdimage.ubuntu.com/lubuntu/daily-live/20201127/hirsute-desktop-amd64.iso
Machine used Acer [Aspire] E3-111-P60S (Pent.N3530, 4GB)
Opened all LibreOffice apps one by one and selected Impress templete "Vivid" as in the video posted in comment # 7 and received the same results as KGIII.
I can confirm this bug - testing Lubuntu Hirsute daily 27.11.2020 on the QA site
http:// cdimage. ubuntu. com/lubuntu/ daily-live/ 20201127/ hirsute- desktop- amd64.iso
Machine used Acer [Aspire] E3-111-P60S (Pent.N3530, 4GB)
Opened all LibreOffice apps one by one and selected Impress templete "Vivid" as in the video posted in comment # 7 and received the same results as KGIII.