We just released Playdate OS/SDK 1.13.3. This includes a pair of important fixes: Lua performance improvements for the issue that showed up in 1.13.0, and correcting a battery drain issue.
More info is available at Playdate SDK Changelog. Please update your devices and your dev environment, and let us know if you have any feedback!
P.S. Develop for Playdate may temporarily list 1.13.2 as the latest SDK version, but if you download anyway, you should receive the 1.13.3 SDK. The version number should update by the end of the day. There was also an error on the date displayed under 1.13.3 on the changelog site, but that has already been corrected.