The number of Japanese characters per line on the sign has decreased.

Prior to the 26.60 update, it was possible to enter up to 13 Japanese characters per line on a sign. However, the 26.60 update introduced extra spacing between characters, which has reduced the limit to 9 characters per line.
This has made the text extremely difficult to read, and signs that previously fit on a single line now require two, which is highly inconvenient.