There's a PHP issue while converting from lat back to tile as [documented here](https://gist.github.com/gopi-ar/7c44a47c2b0f920b34cf7641bd74733d). This will need fixing here: https://github.com/HTML24/mbtiles-generator/blob/6dcb5dc79f1c02f55d633103d8b24df0b38257ff/src/HTML24/MBTilesGenerator/Util/Calculator.php#L41
There's a PHP issue while converting from lat back to tile as documented here. This will need fixing here:
mbtiles-generator/src/HTML24/MBTilesGenerator/Util/Calculator.php
Line 41 in 6dcb5dc