In 3.7, our site block (as implemented in MOBILE-2935) worked; in 3.7.1, it stopped working.

I have investigated and the cause is that our 'handlers' in mobile.php was:

            'linksview' => [

                'delegate' => 'CoreBlockDelegate',

                'method' => 'mobile_block_view',

                'styles' => [

                    'url' => $CFG->wwwroot . '/blocks/ousitelinks/mobile.css?v=2019071600',

                    'version' => 2019071600

                ]

            ]

Note that there is no 'displaydata' array. Adding this makes the block work again:

                'displaydata' => [

                ]

So this is easily fixed at our end. However, I think it would be better if the code continued to work if displaydata is omitted (it throws a javascript error). I'll submit a patch although this is not urgent.