As reported earlier, I was having troubles using Kobo Tsukushi Mincho font. Despite not using the font anymore, I was a feeling a bit uneasy about it, so I thought to do a clean-up of my Glo.
I took a backup of my books and SQL database, did a factory reset, reinstalled the upgrade 3.19.5613, patched it with Metazoa patches and Nightmode patch, and put back my backup and my other sideloaded fonts on the device.
After this process, I observe that the font is not giving problems. Books do not close any more while page turns, and I can switch back to another fonts without switching off the device. I have tried both Kepubs and sideloaded epubs.
I do not know what caused this phenomenon, but I wish to bring this to the notice of tech-Gurus here, if it is relevant and significant in any way.
