WhatsApp has released a fix to an issue that replaced the timestamps on the Android beta version of the app with ASCII codes. On beta version 2.18.109 this bug was found, and did not have a big impact on the chat experience other than changing the ‘Yesterday’ and ‘Today’ timestamps with ASCII codes.
According to the WABetaInfo, the first characters of “Today” and “Yesterday” on the WhatsApp beta version 2.18.109 were replaced by “89ESTERDAY” and “84ODAY”. It is worth noting here that the ASCII code of the alphabet T is 84 and alphabet Y is 89. Therefore, the bug was primarily changing the first alphabets of the affected timestamps with their ASCII codes. It was also all-pervasive in nature – showing the strange timestamps across WhatsApp Status, messages, and calls.