HHVM compatibility : Case insensitive constant names not supported

Hi, when trying HHVM the error logs fill up with errors like these:

[Mon May 23 16:36:06 2016] [hphp] [7875:7f7a76fff700:6:000001] [] Warning: Case insensitive constant names are not supported in HipHop in /.../.../.../wp-content/plugins/wordpress-google-maps/wpmu_dev_maps_plugin.php on line 27
[Mon May 23 16:36:06 2016] [hphp] [7875:7f7a76fff700:6:000002] [] Warning: Case insensitive constant names are not supported in HipHop in /.../.../.../wp-content/plugins/wordpress-google-maps/wpmu_dev_maps_plugin.php on line 36
[Mon May 23 16:36:06 2016] [hphp] [7875:7f7a76fff700:6:000003] [] Warning: Case insensitive constant names are not supported in HipHop in /.../.../.../wp-content/plugins/wordpress-google-maps/wpmu_dev_maps_plugin.php on line 37
[Mon May 23 16:36:06 2016] [hphp] [7875:7f7a76fff700:6:000004] [] Warning: Case insensitive constant names are not supported in HipHop in /.../.../.../wp-content/plugins/wordpress-google-maps/wpmu_dev_maps_plugin.php on line 38
[Mon May 23 16:36:06 2016] [hphp] [7875:7f7a76fff700:6:000005] [] Warning: Case insensitive constant names are not supported in HipHop in /.../.../.../wp-content/plugins/wordpress-google-maps/wpmu_dev_maps_plugin.php on line 53
[Mon May 23 16:36:06 2016] [hphp] [7875:7f7a76fff700:6:000006] [] Warning: Case insensitive constant names are not supported in HipHop in /.../.../.../wp-content/plugins/wordpress-google-maps/lib/class_agm_plugins_handler.php on line 8
[Mon May 23 16:36:26 2016] [hphp] [7875:7f7a65bff700:9:000001] [] Warning: Case insensitive constant names are not supported in HipHop in /.../.../.../wp-content/plugins/slide-in/loader.php on line 28
[Mon May 23 16:36:26 2016] [hphp] [7875:7f7a65bff700:9:000002] [] Warning: Case insensitive constant names are not supported in HipHop in /.../.../.../wp-content/plugins/slide-in/loader.php on line 29
[Mon May 23 16:36:26 2016] [hphp] [7875:7f7a65bff700:9:000003] [] Warning: Case insensitive constant names are not supported in HipHop in /.../.../.../wp-content/plugins/slide-in/loader.php on line 30
[Mon May 23 16:36:26 2016] [hphp] [7875:7f7a65bff700:9:000004] [] Warning: Case insensitive constant names are not supported in HipHop in /.../.../.../wp-content/plugins/slide-in/loader.php on line 39
[Mon May 23 16:36:26 2016] [hphp] [7875:7f7a65bff700:9:000005] [] Warning: Case insensitive constant names are not supported in HipHop in /.../.../.../wp-content/plugins/slide-in/loader.php on line 40
[Mon May 23 16:36:26 2016] [hphp] [7875:7f7a65bff700:9:000006] [] Warning: Case insensitive constant names are not supported in HipHop in /.../.../.../wp-content/plugins/slide-in/loader.php on line 41

These are related to Google Maps and Slide-in but looking around the forums there are many other plugins that suffer this issue with HipHop Virtual Machine...

Will this be dealt with or is HHVM not considered as a viable/stable alternative (yet) ?